An electromagnetic radiation of frequency n, wavelength andlambda;, travelling with velocity v in air enters in a glass slab of refractive index (andnu;). The frequency, wavelength and velocity of light in the glass slab will be respectively [1997]a)b)c)d)Correct answer is option 'A'. Can you explain this answer?

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An electromagnetic radiation of frequency n, wavelength λ, travelling with velocity v in air enters in a glass slab of refractive index (ν). The frequency, wavelength and velocity of light in the glass slab will be respectively [1997]

Correct answer is option 'A'. Can you explain this answer?

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An electromagnetic radiation of frequency n, wavelength λ, trav...

When electromagnetic wave enters in other
medium, frequency reamains unchanged
while wavelength and velocity become 1/μ times.

So, For e.m. wave entering from air to glass
slab (μ), frequency remains n,

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