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

Options

A. `sin^(-1)(3/4)`
B. `sin^(-1)(3/5)`
C. `sin^(-1)(4/5)`
D. Data given is insufficient

Answer

C

Explanation

Critical angle
`C=sin^(-1)((mu_(w))/(mu_(g)))`
`=sin^(-1)((4//3)/(5//3))=sin^(-1)(4/5)`