Question

An equilateral prism deviates a ray through `40^@` for two angles of incidence differing by `20^@`. The possible angles of incidences is
A. `30^(@)`
B. `50^(@)`
C. `20^(@)`
D. `60^(@)`

Answer 1

Correct Answer - D
`1+e-A=40^(@)`
`i+e=100^(@) (A=60^(@))`
different between I and e is `20^(@)`
So, I and e may be `40^(@)` and `60^(@)`