Recent questions in Speed of Light

+9 votes

0 answers

Are the speed of light and the distance between Earth and Sun mentioned in Hanuman Chalisa? If yes, how could Tulsidas calculate the speed of light without any instruments or scientific knowledge?

asked Feb 10, 2023 in Speed of Light by JOMEL

+27 votes

0 answers

How fast do things appear to go past you when travelling near the speed of light (space)? Do they seem blurry or clear?

asked Jan 20, 2023 in Speed of Light by Bob

+122 votes

0 answers

Does light travel faster in any particular direction?

asked Jan 20, 2023 in Speed of Light by Tom_MM

+18 votes

0 answers

What if the constancy of the speed of light (in the special theory), and the principles of general covariance and the equivalence of inertial and gravitational mass (in the general theory) are never a priori according to Witten?

asked Jan 20, 2023 in Speed of Light by Adie Moore

+138 votes

0 answers

How do you create an Interstellar empire? Is FTL (faster than light) travel necessary?

asked Jan 20, 2023 in Speed of Light by NovaOracle (3.4k points)

+23 votes

0 answers

Why do the outer edges of galaxies rotate at the same speed as the inner?

asked Jan 19, 2023 in Speed of Light by Sambates123

+3 votes

0 answers

What is the definition of light? What is the relationship between light and mass? Does Einstein's equation E=mc² mean that light can never be converted into energy?

asked Jan 19, 2023 in Speed of Light by Camperdown

+222 votes

0 answers

How far can visible light travel in a vacuum before losing its energy? How much time would it take before this happens at room temperature (approximate answers)?

asked Jan 19, 2023 in Speed of Light by peachesberate

+6 votes

0 answers

If an object travels faster than the speed of light, then doesn't the object also move backward in time?

asked Jan 19, 2023 in Speed of Light by Andrew Whiteman

+26 votes

0 answers

How do we know that space-time is curved and not flat if nothing can go faster than the speed of light?

asked Jan 19, 2023 in Speed of Light by MysticDreamer

+117 votes

0 answers

What would have happened if immediately after the big bang all matter and energy in the universe traveled faster than the speed of light without slowing down?

asked Jan 19, 2023 in Speed of Light by Nikki123

+8 votes

0 answers

How much bandwidth limit a single fiber optic cable in single mode have? Suppose in ideal world speed of light is aprox 300,000 km/s, in this way we may have 286 Mb/s over distance of 1 meter, but we see there are over giga bits connection found.

asked Jan 19, 2023 in Speed of Light by RadiantCharm

+6 votes

0 answers

Expansion of space can exceed the speed of light. If true, distance units of "light years" is non-standard and variable since the distance is expanding at increasing faster than light speeds. Is there some other distance unit that is appropriate?

asked Jan 19, 2023 in Speed of Light by StellarCharm

+4 votes

0 answers

How far would you have to travel from Earth before your aging stops completely if you could travel at the speed of light (not considering relativity)?

asked Jan 19, 2023 in Speed of Light by Ric65

+187 votes

0 answers

What is the speed of light? Why does it not have an upper limit?

asked Jan 19, 2023 in Speed of Light by Matt Blandford

+19 votes

0 answers

How does one explain time-travel without breaking the laws of physics (moving faster than light, changing past, etc.)?

asked Jan 19, 2023 in Speed of Light by horrorpassage

+6 votes

0 answers

Has there been an experiment which proves that information cannot travel faster than the speed of light without being carried by some kind of matter/energy carrier?

asked Jan 18, 2023 in Speed of Light by BillDL

+71 votes

0 answers

If an object travels faster than the speed of light and then turns around and comes back, will it arrive before it actually left or after?

asked Jan 18, 2023 in Speed of Light by haystack

+2 votes

0 answers

Is light constant speed the dumbest physics law in all of physics and an expression of the ignorance of physicists considering physicists lack mathematical skills and technical knowhow?

asked Jan 18, 2023 in Speed of Light by relativedifficulty

+16 votes

0 answers

To calculate the energy of a photon multiply it’s mass by it’s velocity squared. E=mc^2 so the same for a 1 kilo object at 1 m/s, e=1 kg*(m/s) ^2, so what is the energy of a photon at the speed of light? E=mass*velocity squared. Is that all E is?

asked Jan 18, 2023 in Speed of Light by ???®?©?€

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