First slide

Total internal reflection - Ray optics and optical instruments

Question

The refractive index of water is $\frac{4}{3}$ and that of glass is $\frac{5}{3}$ . What will be the critical angle for the ray of light entering water from the glass

Moderate

A

$\sin^{- 1} \frac{4}{5}$
B

$\sin^{- 1} \frac{5}{4}$
C

$\sin^{- 1} \frac{1}{2}$
D

$\sin^{- 1} \frac{2}{1}$

Solution

$_{w} μ_{g} = \frac{1}{sinC} \Rightarrow \frac{μ_{g}}{μ_{w}} = \frac{5 / 3}{4 / 3} = \frac{1}{sinC} \Rightarrow sinC = \frac{4}{5} \Rightarrow C = \sin^{- 1} (\frac{4}{5})$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App