An electromagnetic wave of frequency \[v=3.0\text{ }MHz\] passes from – McqOptions

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1.	An electromagnetic wave of frequency \[v=3.0\text{ }MHz\] passes from vacuum into a dielectric medium with permittivity \[\in \,=4.0\]. Then
A.	wavelength is halved and frequency remains unchanged
B.	wavelength is doubled and frequency becomes half
C.	wavelength is doubled and the frequency remains unchanged
D.	wavelength and frequency both remain unchanged.
Answer» B. wavelength is doubled and frequency becomes half

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