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

Options

A. `(upsilon)/(mu), (lambda)/(mu) and (c)/(mu)`
B. `upsilon, (upsilon)/(mu) and (c)/(mu)`
C. `upsilon, 2lambda and (c)/(mu)`
D. `(2upsilon)/(mu),(lambda)/(mu) and c`

Answer

B