Question

Deviation of a thin prism of refractive index n and angle of prism A is​

Answer 1

Deviation of a thin prism of refractive index n and angle of prism A is given by,

$\delta=(\eta-1)A$

where $\delta$ denotes deviation angle of thin prism , $\eta$ denotes refractive index of prism with respect to medium and A denotes angle of prism.

here you should remember that, above formula is applicable only when angle of prism less than 10° e.g., A < 10°

otherwise you must apply regular concept. e.g., $\delta=i+i'-(r+r')$

and $(r+r')=A$ for better understanding see figure.

Answer 2

A... {I-n}A

B...{n-1}A

C...{n+1}A

D...{1+n}A^2