Questions
An electromagnetic wave of frequency v = 3.0 MHz passes from vacuum into a dielectric medium with relative permittivity Then
a
wavelength is doubled and the frequency remains unchanged
b
wavelength is doubled and frequency becomes half
c
wavelength is halved and frequency remains unchanged
d
wavelength and frequency both remain unchanged
detailed solution
Correct option is C
Refractive index =μεμ0ε0Here μ is not specified so we can consider μ=μ0, then Refractive index =εε0=2Hence, speed and wavelength of wave becomes half and frequency remains unchanged.Talk to our academic expert!
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The velocity of electromagnetic radiation in a medium of permittivity and permeability is given by
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