Critical angle of glass is `theta_(1)` and that of water is `theta_(2)`. The critical angle for water and glass surface would be `(mu_(g)=3//2, mu_(w)=4//3)`

Options

A. less than `theta_(2)`
B. between `theta_(1)` and `theta_(2)`
C. greater than `theta_(2)`
D. less than `theta_(1)`

Answer

c.

Explanation

`sintheta_(1)=(1)/(mu_(g))` and ` sintheta_(2)=(1)/(mu_(w))`
Since `mu_(g) gt mu_(w), theta_(1) lt theta_(2)`
Critical angle `theta` between glass and water will be give by
`sintheta=(mu_(w))/(mu_(g))`
or `thetagttheta_(2)`