Two prisms of identical geometrical shape are combined with their refracting angles oppositely directed. The materials of the prisms have refractive indices 1.52 and 1.62 for violet light. A violet ray is deviated by `1.0^@` when passes symmetrically through this combination. What is the angle of the prisms ?

Answer

A

Explanation

Two prisms of identical geometrical shape are combined
`Ler A=angle of the prisms
`mu_y=1.52 and mu_y=1.62`
`mu_y=1.0^@`
`delta_y=(mu_y-1)A-(mu_y-1)A` [since A=a]
`delta_y=(mu_y-mu_y)A`
`A=delta_y/(mu_y=mu_y)=1/((1.62)-(1.52))`
`=1/0.1=10^@`