An electromagnetic radiation of frequency 
, wavelength 
, travelling with velocity 
in air, enters a glass slab of refractive index 
. The frequency, wavelength and velocity oflight in the glass slab will be respectively
and 
and 
and 
and 
Text Solution
Verified by ExpertsD
: Frequency 
; Wavelength 
; Velocity of light in air 
and refractive index of glass slab 
Frequency of light remains the same, when it changes the medium. Refractive index is the ratio ofwavelengths in vacuum and in the given medium. Similarly refractive index is also the ratio of velocities in vacuum and in the given medium.
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