why the speed of light is same to every observer?

Question

i mean if two observer is moving with different speed they can see light travel at same speed.why?

Answer 1

Because the speed of light is constant

Answer 2

What is a quantum of light?
Quantum of light is a particle and wave simultaneously.
Exact there is a simultaneity of space and time.
For me such explanation is unsatisfactory.
It just as to speak, that the logic information and
the senseless message are the same simultaneously.
To say half truth is worse then to say lie.
* * *
Quantum of light is a privileged particle.
Only the speed of a light quantum in Vacuum has
a maximal, constant, absolute quantity of c=1.
No other particle can travel with the speed c = 1.
If quantum of light flies always rectilinearly c=1, it is a mad one.
Is he really mad?
* * *
Only the speed of a light quantum has
a absolute quantity of c=1.
No other particle can travel with the speed c = 1.
And I was taught at school from the first class:
that the incommensurable quantities cannot be compared.
To connect incommensurable quantities it
is similar to the decision of a problem:
“What will be if the whale will attacks the elephant?”
============
Socratus

Answer 3

mostly when an observer is travelling the maximum range will be upto 1000+ km/hr.where as the speed of light is 3*10^8m/sec.comparing to this value the speed of any number of observers is negligable.so the relative difference in observation of the speed of light is not exactly observed by the observer.this is same as comparing 1000million dollars to a single dollar.
that is why the speed of light is same to every observer.

Answer 4

The difference in speed of the observers is very slow in relation to the speed of light, any difference would be unobservable

Answer 5

That is why it is said to a relative. The speed of light is always referenced to an object that is by definition at rest and not moving. Even when it is concerning an object that is moving, the speed of light is as if the object is at rest.

Answer 6

This is an extremely weird fact about nature. It seems to be true, but nobody knows why. You could try to explain it with "length contraction", but then.... why does length contraction happen? Nobody knows why length contraction happens, but we know that it happens.

The fact that the speed of light is constant is usually taken to be a fundamental assumption of the special theory of relativity, from which many other consequences are derived.