An electromagnetic wave of frequency n = 3.0 MHz passes
from vacuum into a dielectric medium with relative
permittivity ℰ = 4.0. Then [NEET Kar. 2013]
(a) wavelength is doubled and frequency is unchanged
(b) wavelength is doubled and frequency becomes half
(c) wavelength is halved and frequency remains
unchanged
(d) wavelength and frequency both remain unchanged
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An electromagnetic wave of frequency v=3.0MHz passes from vacuum into a dielectric medium with permittivity ε=4.0. Then. Δλ=c/√εv-cv=cv(1√ε-1)=- 50M
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