Two beams of light are incident normally on water (R.I. = 4/3). If the beam 1 passes through a glass of height h as shown in the figure, the time difference for both the beams for reaching the bottom is
A
Zero
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
The refractive index of glass is greater than that of water. Therefore the speed of light in glass is lesser than that of water. It is given as
v = 
where C = 3 x 10 8 v = speed of light in a medium of R.I. n
∴ ∴ The time difference for the rays
= t 1 – t 2 = 
⇒ ⇒ Δ Δ t = 
⇒ ⇒ Δ Δ t = 
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