question_answer

An electromagnetic radiation of frequency n wavelength \[\lambda ,\] travelling with velocity v in air, enters a glass slab of refractive index\[\mu .\] The frequency, wavelength and velocity of light in the glass slab will be respectively:

A)  \[\frac{n}{\mu },\frac{\lambda }{\mu }\] and \[\frac{v}{\mu }\]

B)  \[n,\,\frac{\lambda }{\mu }\] and \[\frac{v}{\mu }\]

C)  \[n,\,2\lambda \] and \[\frac{v}{\mu }\]              

D)  \[\frac{2\mu }{\mu },\,\frac{\lambda }{\mu }\] and\[v\]