NEET2013Physics-Electromagnetic Waves
NEET 2013 Physics Wave Propagation MCQ Question
Type: MCQ-conceptual-Medium-Class 12
An electromagnetic wave of frequency ν = 3.0 MHz passes from vacuum into a dielectric medium with relative permittivity ε = 4.0. Then:
A
Wavelength is doubled and frequency becomes half
B
Wavelength is halved and frequency remains unchanged
C
Wavelength and frequency both remain unchanged
D
Wavelength is doubled and frequency unchanged
Correct Answer
Option B
Detailed Explanation
The frequency of an electromagnetic wave remains unchanged when it enters a different medium, but the wavelength changes according to λ = λ₀/√ε.
Found an issue with this question?