Question

10) What is the time taken by sun light to pass through a window of
thickness 4 mm whose refractive index is 1.5?
a 10^-11 sec
b 10^11 sec
c 2x 10^-11 sec
d 2 x 10^11 sec​

Answer 1

Answer:

Time taken = thickness/ speed in glass

= 4×10 ^−3 /3×10^ 8/ 1.5

(∵ speed in glass = speed in vacuum/

R.I.ofglass(

= 4×10 ^−3 ×1.5 /3×10 ^8

=2×10 ^−11 s

Explanation:

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