Question

Einstein's postulate that concerns the speed of light is that (2 points)
A. Rulers and clocks cannot be used to measure the speed of light
B. Nothing can travel faster than the speed of light
C. All uniformly moving observers measure the same speed of light
D. The speed of light is defined as 3 E8 m/s

Answer 1

Answer:

"Option C is the correct choice"

Explanation:

According to the Einstein theory of special relativity.

1). First postulate (principle of relativity)

The laws of physics are the same in all inertial frames of reference.

2). Second postulate (invariance of c)

The speed of light in free space has the same value c in all inertial frames of reference.

It is clear that option A and Option B is not correct.

Because option A is about measurement of light.

Option B is about the maximum speed of object.

Theory of special relativity do not contain any information about Option B directly but we can realize it by arguing as

"Since according to theory of special relativity only object of zero mass     can travel with speed of light and it is impossible because their does not exist object of zero mass."

Now option D is only concerns with the definition of speed.

So

The option C is the most correct choice in this case.

Answer 2

Answer:

C

Explanation: