Time taken by light to cross a glass slab of the
thickness 4 mm and refractive index 3 is?
Answers
Answered by
10
Answer:
The answer will be 4 * 10^-11 second.
Explanation:
Given;
Thickness of glass slab = 4mm;
Refractive index = 3;
Refractive index of glass = velocity of light in vacuum / velocity of light in the medium
Thus, μ = (3 * 10^8) / velocity of light in that medium
3 = (3 * 10^8) / velocity of light in that medium
velocity of light in that medium = (3 * 10^8) / 3
= 10^8 m/s
Time to be taken = Distance to be travelled / speed of light;
Thus, time = (4 * 10^-3) / 10^8
= 4 / (10^8 * 10 ^3)
= 4 / 10^11 sec = 4 * 10^-11 second.
That's all.
Similar questions