Closer To Truth: Is Time Travel Possible?

There is an ongoing PBS TV series (also several books and also a website) called “Closer To Truth”. It is hosted by neuroscientist Robert Lawrence Kuhn. He’s featured in one-on-one interviews and panel discussions with the cream of the cream of today’s cosmologists, physicists, philosophers, theologians, psychologists, etc. on all of the Big Questions surrounding a trilogy of broad topics – Cosmos; Consciousness; God. The trilogy collectively dealt with reality, space and time, mind and consciousness, aliens, theology and on and on and on. Here are a few of my comments on one of the general topics covered – Is time travel possible?

# Is time travel possible? Actually I personally don’t believe time exists. Change exists, and time is just our measurement of rate of change. IMHO time is just a concept. Time is a mental construct that helps us come to terms with change. Some cosmologists say that time was created at the Big Bang, as if time were a thing with substance and structure, but I challenge them to actually create some time in front of their peers or maybe a TV audience or at least produce a theoretical equation or two that would create time. In the meantime, here’s a trilogy of points.

First, the concept of time travel is one of those fun parts of physics. Whether true or not, it is entertaining to play the ‘what if’ game. If nothing else, the concept makes or forces one to think about the nature of reality.

Secondly, Einstein and others have postulated that time travel is a theoretical reality and I’m not in their sort of league that I can dispute the theories. I’ll leave that to others who know the field inside and out.

But thirdly, and most importantly, you can never actually be in the future or the past, only in the future or the past compared to where and when you are now. In other words, no matter how you slice and dice things, you exist in the where-ever and in the whenever in that where-ever’s or whenever’s NOW or in other words in the present. You cannot literally be in any future or in any past since you only experience the NOW which is the present. If you should somehow travel back one hour, you would still experience things as belonging to NOW. If you sleep for one hour then wake up, you are in the future relative to when you went to sleep, but you still find yourself in the NOW.

# Is time travel possible? The answer is both yes and no. Yes, we can travel into the future at one second per second, we do that anyway whether we like it or not. Yes we can travel into the future at a slightly quicker rate by going to sleep or otherwise having our sense of consciousness, our awareness of rate of change (which is what time really is or measures) incapacitated. You get drunk and pass out and the next thing you know you are 12 hours into the future. Yes we can travel into the future as outlined by Einstein’s twin ‘paradox’ where one twin travels at a very high rate of speed outward bound, stops and returns to home base, while the stay at home twin, well, stays home. Upon their reunion the travelling twin finds their stay at home twin to be far older, so the travelling twin has travelled into the future more rapidly than would otherwise have been the case. Yes, you can travel back in time, in theory, according to the apparent theoretical properties that wormholes or black holes can have. No, you can’t travel to the past because of all of those nasty paradoxes. I like the variation on the grandfather paradox whereby you travel back just one hour into the past and shoot yourself dead. That’s a novel way of committing suicide! The other paradox I like is when you go back in time to have Shakespeare autograph your copy of “Hamlet”. Shakespeare isn’t home but the maid promises to have him autograph your book when he returns. Alas, your timing is slightly off and Shakespeare hasn’t yet written “Hamlet”, so when he receives your copy from his maid to autograph, he reads it, and after you return to Shakespeare’s home and receive back your now autographed copy and return home to your own time, Shakespeare now writes “Hamlet”. The paradox is, where did “Hamlet” come from since Shakespeare only wrote it after he had already seen your copy. No, you can’t travel back to the past because if that were possible there would be hoards of time-travelling tourists who went back in time to witness some important historical event or other. No hoards of photo-snapping tourists have ever been documented being present at Custer’s Last Stand, the Battle of the Alamo, the sinking of RMS Titanic, or any one of thousands of similar historical events. Yes, you can travel back in time but only into a parallel universe. If you shoot yourself but it is another you in another universe, no paradox arises. You travel back in time to have Shakespeare autograph your copy of “Hamlet” but in that parallel universe Shakespeare can now write “Hamlet” based on your copy and no paradox results. However, the one point I find interesting is that if you end up in the future, or in the past, are you really in the future or the past? No, the only time you can exist in is the present, your right here and NOW time. It might be a different time from what you previously knew, but still wherever and whenever you exist, you only exist in the NOW.

# Is time travel possible? It could already be the case that time travel has been documented at the quantum level although that could be open to interpretation. Before I get to the specifics, I just need to point out that with respect to the laws, principles and relationships of physics, time is invariant. Operations in physics remain invariant in time whether time is moving as we normally perceive it (past to future) or back to front (future to past). For example, gravity would operate as per its normal grab-ity self in a world where time flowed backwards. There’s many an operation one could film that when the film were run backwards, one wouldn’t be any the wiser. Tree branches blowing in the wind comes to mind, or the coming together, collision, and rebounding or separation of two billiard balls. Okay, having established that when it comes to physics, physics doesn’t care which direction time is flowing, there will be no violations in those laws, principles and relationships of physics future to past, we now come to the delayed double slit experiment.

In the normal double slit experiment, you have an electron gun that fires one electron particle at a time, such that one electron completes its journey before the next one is fired, at two side-by-side slits. If one or the other slit is open, the one-at-a-time electrons pass through the open slit to a detector screen behind the slits. The detector screen gets hit in nearly the same spot every time after each and every electron particle passes through the single open slit. That is straight forward. If both slits are open, the electron shape-shifts into a wave (how I don’t know), passes through both slits (as only a wave can), morphs back into a particle and hits the detector screen. The difference is that after enough electrons have been fired, and have passed or waved through the double slits, the hits on the detector screen are not in just one or two spots but all-over-the-map, albeit all-over-the-map in a classic wave interference pattern. Okay, that’s the classic experiment.

Now we do a variation on the theme, the delayed double slit experiment. Electrons are fired one-at-a-time, with both slits wide open. An all-over-the-map classic wave interference pattern should appear on the normal detector screen after enough electrons have been fired. However, in addition to the normal detection screen, there are two other detectors positioned behind the normal detector screen that are each in an exact line-of-sight with each of the two slits. The electron is fired. It morphs into a wave and passes through both slits then morphs back into a particle. But before the electron, which has already passed through both slits, can hit the detector screen, the detector screen is removed to reveal behind it the other two line-of-sight detectors. Now presumably once the electron has passed though the double slits it’s too little too late to change its mind about where it’s going to hit. Only a tiny few should be detected by the two line-of-sight detectors aligned with the two slits. Alas, each and every electron will be detected by one or the other of the line-of-sight detectors. It would appear that the electron CAN change its mind after it has already gone through both slits and instead appear to have gone through one or the other of the two slits. One interpretation is that the electron, after having passed through both slits, realised the gig was up, travelled back in time, retraced its path and passed through one or the other slit.

As an aside, the late Nobel Laureate Richard Feynman noted that the double slit experiment went to the heart of quantum weirdness. I mention this because it was the same Richard Feynman who suggested that a positron (an anti-electron) was just an ordinary electron that was going backwards in time.

# Is time travel possible? I have several other points to make about the concept of time travel.

Firstly, there is Stephen Hawking’s idea of a Chronology Protection Conjecture which postulates that there is some as yet undiscovered law of physics which prevents time travel to the past and thus makes the cosmos a safe place for historians to strut their stuff.

Secondly, it has been said that you cannot travel farther back in time than the date your time travel ‘device’ was constructed, be it a wormhole or some other gizmo. So if some genius builds a time travelling ‘device’ in 2014, he’s not going anywhere into the past. But in 2015 he can travel back to 2014 and in 2114 he could travel back to any time between 2114 and 2014. The analogy is that you cannot travel through a tunnel prior to when that tunnel was built. Thus, we don’t see human time travelers because no human time travelling ‘device’ has yet been constructed. The flaw there is that doesn’t prohibit ET from visiting who might have constructed a time travelling ‘device’ millions of years ago. Recall those pesky UFOs though they don’t seem to cluster around significant terrestrial historical events so maybe ET doesn’t care about our history and are just here on vacation from their future.

Thirdly, presumably your time travelling ‘device’ is fixed at some sort of celestial coordinates. Because everything in the cosmos is in motion, when you re-emerge into that cosmos after starting on a time travelling journey, while you may be at those same fixed celestial coordinates the rest of the cosmos would have moved to differing celestial coordinates. So, if you start out in London you won’t end up in London on down, or up, the time travelling track. Finally, the concept of your, or the future or of the past or your past is only relative to what you choose as some fixed point. If you pick your date of birth as that fixed point, then clearly you are now in the future relative to your date of birth. If you pick the concept of an ever ongoing NOW, the present, as a fixed point, you are neither in the future or the past relative to the NOW nor will you ever be. That of course doesn’t mean you can’t recall your past, what existed before your NOW (although the past in general is more abstract) or plan for your future after your NOW (although the future in general is beyond your control).

# Is time travel possible? There’s yet another form of time travel, or at least the illusion of time travel, and that’s via the cinema. Films and TV shows involving time travel are many and often legendary. But that’s not quite the medium I wish to explore here. One can program time travel into a computer simulation. You can have a video game where the characters travel backwards (or forwards) in time, or have a software program that loops around back to the beginning. Now the question is, might we be characters or virtual beings in a Simulated (Virtual Reality) Universe? If so, the software programs that run our virtual show might allow for time travel, or virtual time travel, yet still time travel that would appear to us to be quite real. Now where does our sense of deja vu really come from?

# Is time travel possible? There is one other form of pseudo ‘time travel’ towards the future that can be debunked. Presumably the only way you can know what the future brings, without benefit of any theoretical ‘device’ that can propel you there at a greater rate of knots than at one second per second, is to stay alive. Once you kick-the-bucket that’s it. Your second per second journey towards the future is over. It’s a pity that that worthless stock you hold just happens to sky-rocket to fantastic values within a week of your demise, or maybe you’d really like to know if ET exists but the discovery happens a few days too late as far as you are concerned. Of course some might claim an afterlife will enable you to keep up to date with future happenings from that heavenly vantage point high up in the sky, but apart from that, there are those who claim to have led past lives or existed in past incarnations. Thus, you can still continue your journey to discover what the future holds by passing on to another body via being conceived again (and again and again). There’s one huge problem however with ‘remembering’ alleged past lives. Your mother’s egg cell cannot remember your past lives. Your father’s sperm cell cannot have any recollection of your past lives. Therefore, the you that comes to pass at conception cannot hold any memory of past lives. So, where did your memory of past lives come from? Might I suggest that it was internally generated out of wishful thinking, that perhaps a belief that you existed in the past will give rise to a belief that you will exist again in the future, and as a pseudo form of afterlife and as a pseudo form of ‘time travel’ that gives you comfort. Anyway, that concept is a really far out methodology of ‘time travel’ but one which can be dismissed despite the many people who seemingly believe that they indeed have ‘time travelled’ towards their endless future via this method.

How to Be a Travel Agent

If you plan to become a travel agent or want to learn how to start a travel agency from home, you’d be glad to know that there are plenty of agencies that offer certifications, trainings, and the chance to own your very own travel agency.

A travel agent’s job functions may vary from assisting with booking/selling reservations to referring people to travel booking sites, where an agent receives commission.

Here are some tips to help you become a successful travel agent.

Research Travel Institutions and Education

The minimum educational requirement for individuals who want to become a travel agent is a high school diploma. Computerization and technology have increased training needs and most employers prefer applicants with a higher level of education such as a post-secondary vocational award.

There are vocational schools that offer full time travel agent programs as well as weekend and evening programs. These programs are also offered in community colleges and universities.

There are colleges that also offer a bachelor’s or master’s degree in tourism and travel. Although there are only a few courses that directly relate to travel and tourism, college degrees with background in world history, foreign language, communication and geography are often preferred by employers.

The American Society of Travel Agents features a correspondence course that teaches the basics of travel industry. While most travel agencies offer on the job training programs for their employees, there are also many reputable websites that give free detailed information and offer travel agent study course on how to start a travel agency business from home.

Be a Certified Travel Agent

Certifications will enhance your reputation as an agent and will show clients that you have met the professional standards set by an institution in the industry. The travel industry features several certifying organizations that are widely recognized today.

Experienced travel agents can take advantage of study courses from the Travel Institute that leads to a Certified Travel Counselor professional designation. The Travel Institute also features sales/marketing enhancement programs and destination specialist programs that provide a detailed knowledge of regions like:

•Western Europe

•The Caribbean

•North America

•The Pacific Rim

Cruise Lines International Association or CLIA offers various certification programs that are recognized and respected in the travel industry.

Get a Travel Agent Job

Find a job with an agency or partner with an agency to help you run your own travel counseling business. Try to work with an established agency.

There are also travel agencies that allow you to work from home. Find a host agency that will help you in establishing your own travel agency. A host agency will show you how to start a travel agency from home, provide services, back office support, travel suppliers, marketing support and access to reservation portals.

Become a Registered Travel Seller in Your State

There are states that require registration. This type of regulatory requirement helps protect consumers and ensures that agencies are legal. Don’t forget to check with government offices for local regulations.

Become a Part of Organizations

Joining organizations is a great way to stay up-to-date on trends and news in the travel industry. These societies also offer continuing education and updates to their members. If you expect to be booking online airline tickets, become a member of the International Air Transport Association or IATA.

History of Travel & Tourism

2000 years Before Christ, in India and Mesopotamia

Travel for trade was an important feature since the beginning of civilisation. The port at Lothal was an important centre of trade between the Indus valley civilisation and the Sumerian civilisation.

600 BC and thereafter

The earliest form of leisure tourism can be traced as far back as the Babylonian and Egyptian empires. A museum of historic antiquities was open to the public in Babylon. The Egyptians held many religious festivals that attracted the devout and many people who thronged to cities to see famous works of arts and buildings.

In India, as elsewhere, kings travelled for empire building. The Brahmins and the common people travelled for religious purposes. Thousands of Brahmins and the common folk thronged Sarnath and Sravasti to be greeted by the inscrutable smile of the Enlightened One- the Buddha.

500 BC, the Greek civilisation

The Greek tourists travelled to sites of healing gods. The Greeks also enjoyed their religious festivals that increasingly became a pursuit of pleasure, and in particular, sport. Athens had become an important site for travellers visiting the major sights such as the Parthenon. Inns were established in large towns and seaports to provide for travellers’ needs. Courtesans were the principal entertainment offered.
This era also saw the birth of travel writing. Herodotus was the worlds’ first travel writer. Guidebooks also made their appearance in the fourth century covering destinations such as Athens, Sparta and Troy. Advertisements in the way of signs directing people to inns are also known in this period.

The Roman Empire

With no foreign borders between England and Syria, and with safe seas from piracy due to Roman patrols, the conditions favouring travel had arrived. First class roads coupled with staging inns (precursors of modern motels) promoted the growth of travel. Romans travelled to Sicily, Greece, Rhodes, Troy and Egypt. From 300 AD travel to the Holy Land also became very popular. The Romans introduced their guidebooks (itineraria), listing hotels with symbols to identify quality.

Second homes were built by the rich near Rome, occupied primarily during springtime social season. The most fashionable resorts were found around Bay of Naples. Naples attracted the retired and the intellectuals, Cumae attracted the fashionable while Baiae attracted the down market tourist, becoming noted for its rowdiness, drunkenness and all- night singing.

Travel and Tourism were to never attain a similar status until the modern times.

In the Middle Ages

Travel became difficult and dangerous as people travelled for business or for a sense of obligation and duty.

Adventurers sought fame and fortune through travel. The Europeans tried to discover a sea route to India for trade purposes and in this fashion discovered America and explored parts of Africa. Strolling players and minstrels made their living by performing as they travelled. Missionaries, saints, etc. travelled to spread the sacred word.

Leisure travel in India was introduced by the Mughals. The Mughal kings built luxurious palaces and enchanting gardens at places of natural and scenic beauty (for example Jehangir travelled to Kashmir drawn by its beauty.

Travel for empire building and pilgrimage was a regular feature.

The Grand Tour

From the early seventeenth century, a new form of tourism was developed as a direct outcome of the Renaissance. Under the reign of Elizabeth 1, young men seeking positions at court were encouraged to travel to continent to finish their education. Later, it became customary for education of gentleman to be completed by a ‘Grand Tour’ accompanied by a tutor and lasting for three or more years. While ostensibly educational, the pleasure seeking men travelled to enjoy life and culture of Paris, Venice or Florence. By the end of eighteenth century, the custom had become institutionalised in the gentry. Gradually pleasure travel displaced educational travel. The advent of Napoleonic wars inhibited travel for around 30 years and led to the decline of the custom of the Grand Tour.

The development of the spas

The spas grew in popularity in the seventeenth century in Britain and a little later in the European Continent as awareness about the therapeutic qualities of mineral water increased. Taking the cure in the spa rapidly acquired the nature of a status symbol. The resorts changed in character as pleasure became the motivation of visits. They became an important centre of social life for the high society.

In the nineteenth century they were gradually replaced by the seaside resort.

The sun, sand and sea resorts

The sea water became associated with health benefits. The earliest visitors therefore drank it and did not bathe in it. By the early eighteenth century, small fishing resorts sprung up in England for visitors who drank and immersed themselves in sea water. With the overcrowding of inland spas, the new sea side resorts grew in popularity. The introduction of steamboat services in 19th century introduced more resorts in the circuit. The seaside resort gradually became a social meeting point

 Role of the industrial revolution in promoting travel in the west

The rapid urbanisation due to industrialisation led to mass immigration in cities. These people were lured into travel to escape their environment to places of natural beauty, often to the countryside they had come from change of routine from a physically and psychologically stressful jobs to a leisurely pace in countryside.

Highlights of travel in the nineteenth century 

·        Advent of railway initially catalysed business travel and later leisure travel. Gradually special trains were chartered to only take leisure travel to their destinations.

·        Package tours organised by entrepreneurs such as Thomas Cook.

·        The European countries indulged in a lot of business travel often to their colonies to buy raw material and sell finished goods.

·        The invention of photography acted as a status-enhancing tool and promoted overseas travel.

·        The formation of first hotel chains; pioneered by the railway companies who established great railway terminus hotels.

·        Seaside resorts began to develop different images as for day-trippers, elite, for gambling.

·        Other types of destinations-ski resorts, hill stations, mountaineering spots etc.

·        The technological development in steamships promoted travel between North America and Europe.

·        The Suez Canal opened direct sea routes to India and the Far East.

·        The cult of the guidebook followed the development of photography.

 

 

Tourism in the Twentieth Century

 

The First World War gave first hand experience of countries and aroused a sense of curiosity about international travel among less well off sector for the first time. The large scale of migration to the US meant a lot of travel across the Atlantic. Private motoring began to encourage domestic travel in Europe and the west.  The sea side resort became annual family holiday destination in Britain and increased in popularity in other countries of the west. Hotels proliferated in these destinations.

The birth of air travel and after

The wars increased interest in international travel. This interest was given the shape of mass tourism by the aviation industry. The surplus of aircraft and growth of private airlines aided the expansion of air travel. The aircraft had become comfortable, faster and steadily cheaper for overseas travel. With the introduction of Boeing 707 jet in 1958, the age of air travel for the masses had arrived. The beginning of chartered flights boosted the package tour market and led to the establishment of organised mass tourism. The Boeing 747, a 400 seat craft, brought the cost of travel down sharply. The seaside resorts in the Mediterranean, North Africa and the Caribbean were the initial hot spots of mass tourism.

A corresponding growth in hotel industry led to the establishment of world-wide chains. Tourism also began to diversify as people began to flock alternative destinations in the 70s. Nepal and India received a throng of tourists lured by Hare Krishna movement and transcendental meditation. The beginning of individual travel in a significant volume only occurred in the 80s. Air travel also led to a continuous growth in business travel especially with the emergence of the MNCs.

Sarvajeet Chandra writes on issues that are usually brushed under the carpet, or are too everyday-ish for high street strategists. He writes on making strategic plan robust, how to execute strategy well and other tactical issues for everyday business success.