Linked Questions

-1
votes
2answers
48 views

What happens with time when we travel at the speed of light? [closed]

I always wonder how time is related to traveling at the speed of light and what actually happens when we travel at the speed of light. Why does time slow down and what can be the physical explanation ...
0
votes
4answers
90 views

Why does the speed of light in vacuum never change? [duplicate]

why does the speed of light in vacuum never change? Under any circumstances, The speed of light in vacuum never change, why?
3
votes
7answers
220 views

Why is the speed of light in vacuum a universal constant? [duplicate]

While getting familiar with relativity, the second postulate has me stuck. "The speed of light is constant for all observers". why can't light slow down for an observer travelling the same direction ...
0
votes
1answer
72 views

Holding the total velocity below speed of light

If a hydrogen atom accelerates to near the speed of light, the total velocity of the system must not exceed that limit. Even if the electron has no net angular momentum around the proton, as it could ...
13
votes
6answers
3k views

Why Speed of light in vacuum remains constant? [duplicate]

I know that the speed of light remains constant irrespective of whether the light source is moving or not. But it's very difficult for my brain to visualize it. Light has dual characteristics, i.e. of ...
-1
votes
4answers
157 views

We all accept/believe in $c$. But what happens when light travels away from the center of gravity of a heavy star? Does it slow down?

I'm basically trying to understand a mysterious characteristic of the universe. Why light has to travel at $c$? I understand and accept that from experiment. Not arguing that it does not. Just saying ...
3
votes
2answers
127 views

Is a finite lightspeed necessary for cause and effect to exist? [duplicate]

In this question I asked in somewhat unclear (unclear enough to be closed) fashion about the relationship between an infinite speed of light and the existence of cause and effect. In thís question, I ...
10
votes
7answers
1k views

Is the second postulate of Einstein's special relativity an axiom? [closed]

I'm trying to grasp Einstein's special relativity theory and can't seem to find a clear answer as to why Einstein concluded that the speed of light is constant to observers in different inertial ...
0
votes
5answers
219 views

Why a body can not be accelerated to speed of light in vacuum? [duplicate]

Well i know that it needs infinite energy..but the term infinite is itself not physical so i am not satisfied with this answer ...but what would happen if we provide a constant acceleration to an ...
0
votes
4answers
179 views

Different approach of time dilation explanation

Suppose you are going to a distant star, and there is an observer on earth. Usually the answer to the question how long would it take to travel to a distant star is explained this way : You cannot ...
31
votes
12answers
14k views

Can Newton's laws of motion be proved (mathematically or analytically) or are they just axioms?

Today I was watching Professor Walter Lewin's lecture on Newton's laws of motion. While defining Newton's first, second and third law he asked "Can Newton's laws of motion be proved?" and according ...
8
votes
4answers
3k views

Why can't we break the speed of light in vacuum? [duplicate]

I was wondering what could be a possible reason/reasons because of which we cannot break the speed of light barrier. I was reading this where they stated that, Quantum Action Is 10,000 Times Faster ...
0
votes
1answer
1k views

“Why electrons don't fall into nucleus”simple explanation needed [duplicate]

Am studying in 8th grade and I studied electrostatic force which says opposite charge attracts and same charges repel But in an atom electron is just situated above the proton and it doesn't attracts....
2
votes
2answers
402 views

Can the constancy of the speed of light in vacuum be derived from a deeper theory?

Einstein's second postulate of special relativity is: The speed of light in vacuum takes the same value ($c$) for any observer in an inertial frame of reference. I know there is a lot of ...
19
votes
3answers
3k views

Can we tell when an established theory is wrong?

I was reading the following answer from this question: In physics, you cannot ask / answer why without ambiguity. Now, we observe that the speed of light is finite and that it seems to be the ...

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