CUET · PHYSICS · PYQ PAPER 2023
What physical quantity is the same for X-rays of wavelength \( 10^{-10} \) m, red light of wavelength 680 nm and radiowaves of wavelength 50 m?
- A Frequency
- B Amplitude
- C Speed in vaccum
- D wave number
Answer & Solution
Correct Answer
(C) Speed in vaccum
Step-by-step Solution
Detailed explanation
All electromagnetic waves, regardless of their wavelength or frequency, travel at the same constant speed in a vacuum (approximately \(3 \times 10^8 m / s\) ). C) Speed in vacuum.
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