can we get deviation without dispersion?it's a class 10 question?

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yes we can get deviation without dispersion.

the formula is

(A/A') = - (M' - N')/(M - N)

where

A = angle of prism
A' = new angle of prism
M = refractive index of violet light
N = refractive index of red light
M' = new refractive index of violet light
N' = new refractive index of red light...Show more

put 2 triangular prisms side by side one's base up and other's down...Show more

Use a mirror instead....Show more