Light ray travels from air to glass and air to water, as shown in figure (i) and (ii) respectively. What is refraction angle for figure (iii) ?

Options

A. `30^@`
B. `35^@`
C. `60^@`
D. `41^@`

Answer

B, C

Explanation

`""^a mu_g=(sin60^@)/(sin35^@)` …......(1)
`""^a mu_w=(sin60^@)/(sin41^@)` …......(2)
`""^w mu_g=(sin41^@)/(sintheta^@)` …......(3)
`""^amu_g=""^amu_wxx""^wmu_g`
`(sin 60^@)/(sin35^@)=(sin60^@)/(sin41^@)xx(sin41^@)/(sintheta)`
`therefore sin theta=sin 35^@`
`therefore theta=35^@`