wave_mechanics assertion_and_reason Question 21
Assertion : Beats can also be observed by two light sources as in sound. Reason : Light sources have constant phase difference.
Options:
A) If both assertion and reason are true and the reason is the correct explanation of the assertion.
B) If both assertion and reason are true but reason is not the correct explanation of the assertion.
C) If assertion is true but reason is false.
D) If the assertion and reason are both false.
E) If assertion is false but reason is true.
Show Answer
Answer:
Correct Answer: D
Solution:
As emission of light from atom is a random and rapid phenomenon.
The phase at a point due to two independent light source will change rapidly and randomly.
Therefore, instead of beats, we shall get uniform intensity.
However, if light sources are LASER beams of nearly equal frequencies, it is possible to observe the phenomenon of beats in light.
BETA
