Concepts Of Physics MCQ Edition [Volume 1]
- Exam
- Concepts Of Physics MCQ Edition [Volume 1]
- Subject
- Physics
- Chapter
- Light Waves
Concepts Of Physics MCQ Edition [Volume 1] · Physics · Light Waves
The speed of light emitted by a source is measured as v_A , v_B ,...
The speed of light emitted by a source is measured as , , and by three observers , , and , respectively. Observer travels towards the source and observer travels away from the source at an identical speed. Meanwhile, observer remains stationary. The entire surrounding space is a vacuum.
Options
- A
- B
- C
- D
Correct answer
D.
Step-by-step solution
According to the second postulate of the special theory of relativity, the speed of light in a vacuum is an absolute constant.
It is completely independent of the relative motion between the source of light and the observer.
Therefore, all three observers , , and will measure the exact same speed of light, regardless of whether they are moving towards the source, moving away from it, or remaining stationary.
Thus, we have .
It is completely independent of the relative motion between the source of light and the observer.
Therefore, all three observers , , and will measure the exact same speed of light, regardless of whether they are moving towards the source, moving away from it, or remaining stationary.
Thus, we have .