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Light travels through a glass plate of thickness t and refractive index µ. If c is the speed of light in vacuum, the time taken by light to travel this thickness of glass is
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- µtc
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tc μ -
t μc -
μt c
Correct Option: D
Total thickness = t; Refrative index = µ
| Speed of light in Glass plate = | ||
| μ |
 | ∵ v = |  | ||
| R.I. of medium |
| Time taken = | = | |||||
 |  | c | ||||
| μ | ||||||
[where, t = thickness of glass plate]
