A ray of light propogates from glass \left ( \mu _{g} = \frac{3}{2}\right ) to water \left ( \mu _{w} = \frac{4}{3}\right ).The value of critical angle is

Answers (1)

Here, Glass is denser medium : n1= 

Water is rarer medium : n2= 

Light travels from denser to rarer medium.

Let α be the critical angle.

Now,

sin α=(4/3)/(3/2)

sin α=2/3*4/3

sin α=8/9

\alpha= \sin^{-1}\left( \frac{8}{9}\right )

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