Question

the light cross a glass slab of thickness 4 mm and refractive index of glass slab is 3/2 determine time taken by light to cross a glass slab​

Answer 1

We have time taken,

t=

speed

distance travelled

=

μ

c

thickness of the slab

where, μ is the refractive index and c is the velocity of light.

Given, μ=1.5 and thickness =4mm=4×10

−3

m

⟹t=

3×10

8

4×10

−3

×1.5

=2×10

−11

s

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