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The optical path of a monochromatic lig...

The optical path of a monochromatic light is the same if it travels through 4 cm of glass or 4.5 cm of water . If the refractive index of galss is 1.5, then the refractive index of water is

A

`1.2`

B

`1.33`

C

`1.42`

D

`1.46`

Text Solution

Verified by Experts

The correct Answer is:
B
Optical path = `n_(1) d_(1) = n_(2) d_(2)`
`therefore 1.5 xx 4 = 4.5 xx n_(2) therefore n_(2) = (6)/(4.5) = 1.33`
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