Optics Question 276
Question: The speed of electromagnetic wave in vacuum depends upon the source of radiation
[Kerala PMT 2004]
Options:
A) Increases as we move from g-rays to radio waves
B) Decreases as we move from g-rays to radio waves
C) Is same for all of them
D) None of these
Show Answer
Answer:
Correct Answer: C
Solution:
Speed of EM waves in vacuum = $ \frac{1}{\sqrt{{\mu _{0}}{\in _{0}}}} $ =constant
