CUET · PHYSICS · PYQ PAPER 2023
Which of the following statement is not true for the electromagnetic waves?
- A These waves have momentum
- B These waves travel at different speeds in vacuum depending upon their frequency
- C These waves transport energy
- D These waves travel at different speeds in a medium depending upon their frequency.
Answer & Solution
Correct Answer
(B) These waves travel at different speeds in vacuum depending upon their frequency
Step-by-step Solution
Detailed explanation
In a vacuum, all electromagnetic waves travel at the same constant speed ( \(c \approx 3 \times 10^8 m / s\) ), regardless of their frequency or wavelength. While they do change speed when entering a medium (Statement D), their speed in a vacuum is a fundamental constant. B)…
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