The time required for the light to pass through a glass slab (refractive index =1.5 ) of thickness 4 mm is ( c=3 10^8 m s^-1, speed of light in free space)

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Correct answer: B. (b): Speed of light in glass slab is v= c = 3 10^81.5 m s^-1 \# (i ) The time required for the light to pass through a glass slab of thickness 4 mm is t= Thickness Velocity (v ) = 4 10^-3 m 3 10^8 m s^-11.5 \# =2 10^-11 s \#

$The time required for the light to pass through a glass slab (refractive index ) of thickness is ( , speed of light in free space)$

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