STANDARD Physics Wave Propagation in Different Media MCQ Question
An electromagnetic wave of frequency ν = 3 MHz passes from vacuum into a dielectric medium with permittivity ε = 4. Then
wavelength and frequency both become half.
wavelength is doubled and frequency remains unchanged.
wavelength and frequency both remain unchanged.
wavelength is halved and frequency remains unchanged.
Correct Answer
Detailed Explanation
The frequency of electromagnetic wave remains unchanged but the wavelength of electromagnetic wave changes when it passes from one medium to another. The wavelength is halved when the wave enters a medium with permittivity ε = 4.
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