The time required for the light to pass through a glass slab (refractive index=1.5) of thickness 4 mm is(c=3×108 m s-1, speed of light in free space).

Question

The time required for the light to pass through a glass slab (refractive index

= 1.5

) of thickness

4 mm

(c = 3 \times 10^{8} m s^{- 1},

speed of light in free space).

2 \times 10^{- 5} s

2 \times 10^{11} s

2 \times 10^{- 11} s

10^{- 11} s

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