“My model of a time machine uses the curved space-time — to bend time into a circle for the passengers,
not in a straight line
,” said Tippet. “That circle takes us back in time.” Thanks to Einstein’s theory of general relativity, we already know that spacetime is curved.
What would happen if you traveled in a straight line forever?
If you traveled in a straight line, you could travel forever in time, but
you’d only be able to reach a very small proportion of even the observable Universe
. Everything beyond our current cosmic horizon — beyond the limit of what we can presently see — is forever beyond our ability to reach.
Is it faster to travel in a straight line?
We assume that the speed is constant for all the routes. Then,
the straight line is the fastest route when we are travelling on a Euclidean surface i.e. a flat plane
. However, if we are travelling on a non-Euclidean surface, the straight line need not be the fastest route.
Why is time a straight line?
Time is the fourth dimension and is experienced as a line. It is not a mere line. It is but
the entirety of existence stretched into motion
. Time is motion.
Why does light not travel in a straight line?
Light does not travel in a straight path. It travels as a wave. However
as the wavelength is very small
, it looks like it travels in a straight line. Also when light travels from one medium to another, it bends.
Can you travel in any direction in space?
Originally Answered: If you travel downward outside of earth into space, what are you likely to encounter? From anywhere on the surface of the Earth, space is up, not down. Once you get into space,
you can go in any direction
and you are likely to encounter pretty much the same thing. There is no up or down in space.
Can we ever reach the speed of light?
We can never reach the speed of light
. Or, more accurately, we can never reach the speed of light in a vacuum. That is, the ultimate cosmic speed limit, of 299,792,458 m/s is unattainable for massive particles, and simultaneously is the speed that all massless particles must travel at.
Why are there no straight lines in space?
Vedant Laddha said that rays of light in outer space are straight lines. But sun, stars, planets and other massive bodies curve the space.
Astronomers can identify black holes by observing how light changes its direction deviating from the straight line
. Therefore nothing is perfect.
Can you travel to the end of the earth?
The simple answer is,
theoretically, yes
. First, let us ignore friction, the rotation of the earth, and other complications, and focus on the case of a hole or tunnel entering the earth at one point, going straight through its center, and coming back to the surface at the opposite side of the planet.
Why do planes not fly over the Pacific?
Flying over the Pacific Ocean is avoided by most airlines for most flights because
it usually doesn’t make sense to fly over it when shorter and safer routes exist
. The Pacific Ocean is also more remote and less safe than the Indian and Atlantic Oceans to fly over, resulting in a higher chance of a plane crashing.
Why do planes not fly over Antarctica?
What is this?
The polar regions interfere with magnetic navigational equipment, making it harder for planes to navigate
. It can also be difficult for planes to connect with flight controllers because of the location’s isolation.
Why do planes not fly over Tibet?
The leading reason for aircraft avoiding the region is the
high average height of the terrain
. This is over 14,000 feet. Aircraft, of course, cruise much higher than this. But the procedure in the event of an emergency such as cabin depressurization is to descend to 10,000 feet before diverting to an airport.
Does the past still exist?
In short, space-time would contain the entire history of reality, with each past, present or future event occupying a clearly determined place in it, from the very beginning and for ever.
The past would therefore still exist, just as the future already exists, but somewhere other than where we are now present.
Is time Travelling possible?
In Summary:
Yes, time travel is indeed a real thing
. But it’s not quite what you’ve probably seen in the movies. Under certain conditions, it is possible to experience time passing at a different rate than 1 second per second.
Is time just an illusion?
According to theoretical physicist Carlo Rovelli,
time is an illusion
: our naive perception of its flow doesn’t correspond to physical reality. Indeed, as Rovelli argues in The Order of Time, much more is illusory, including Isaac Newton’s picture of a universally ticking clock.
Do photons travel in a straight line?
Photons do not travel in straight lines
. Quantum particles do not have trajectories as classical particles do. Photons do not propagate in all directions as a spherical wave does. Photons are not waves.
Does light always travel in straight line Yes or no?
Yes , light travels in a straight line from its source
but it can bend around objects.
How might you demonstrate that light can travel in a straight line?
Does space have a smell?
A succession of astronauts have described the smell as ‘…
a rather pleasant metallic sensation
… [like] … sweet-smelling welding fumes’, ‘burning metal’, ‘a distinct odour of ozone, an acrid smell’, ‘walnuts and brake pads’, ‘gunpowder’ and even ‘burnt almond cookie’.
Where does Earth end and space begin?
Earth ends and outer space starts at
the Kármán line
, some 62 miles (100 kilometers) above the planet’s surface.
What happens if you fly down in space?
If you do die in space,
your body will not decompose in the normal way, since there is no oxygen
. If you were near a source of heat, your body would mummify; if you were not, it would freeze. If your body was sealed in a space suit, it would decompose, but only for as long as the oxygen lasted.
How fast is the speed of dark?
Darkness travels at the speed of light
. More accurately, darkness does not exist by itself as a unique physical entity, but is simply the absence of light. Any time you block out most of the light – for instance, by cupping your hands together – you get darkness.
Does wormhole exist?
But it also left us with some deep mysteries. One was black holes, which were only unequivocally detected over the past few years. Another was “wormholes” — bridges connecting different points in spacetime, in theory providing shortcuts for space travellers.
Wormholes are still in the realm of the imagination.
Are wormholes possible?
Einstein’s theory of general relativity mathematically predicts the existence of wormholes, but
none have been discovered to date
. A negative mass wormhole might be spotted by the way its gravity affects light that passes by.
Does a straight line exist in nature?
laser light is slightly curved, as light is bent by the Earth’s gravitational field. But if we relax our definition to ‘something that looks straight to the human eye’, then
we can find plenty of straight lines in nature – rock strata, tree trunks, the edges of crystals, strands of spider silk
.
Can you go around the universe?
Thanks to dark energy and the accelerated expansion of the Universe,
it’s physically impossible to even reach all the way to the edge of today’s observable Universe
; we can only get a third of the way there at maximum.
What direction do you travel in space?
There is an up and down in space.
“Down” is simply the direction gravity is pulling you, and “up” is just the opposite direction
. Since there is gravity everywhere in space, there is also an up and down everywhere in space.
