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Refraction of light from air to glass an...

Refraction of light from air to glass and from air to water are shown in figure (i) and figure (ii) below. The value of the angle `theta` in the case of refraction as shown in figure (iii) will be

A

`30^(@)`

B

`35^(@)`

C

`60^(@)`

D

`41^(@)`

Text Solution

Verified by Experts

The correct Answer is:
B
Using Snell's law, `.^(a)mu_(g) = (sin60^(@))/(sin35^(@)), .^(@)mu_(w) = (sin60^(@))/(sin 41^(@))`
and `.^(w)mu_(g) = (sin 41^(@))/(sin theta)`
`.^(@)mu_(w) xx .^(w)mu_(g)`
`rArr (sin 60^(@))/(sin 41^(@)) xx (sin 41^(@))/(sin theta) = (sin60^(@))/(sin35^(@)) rArr sin theta = sin 35^(@)` or `theta = 35^(@)`
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