Published by:
CGP EDU Academic Team
Published on: September 11, 2026
Angle of deviation 
) by a prism (refractive index = 
and supposing the angle of prism A to be small) can be given by
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
To find the angle of deviation \( D \) by a prism when the angle of the prism \( A \) is small, we use the formula:
\[ D = (n - 1) A \]
where \( n \) is the refractive index of the prism.
Given that the refractive index is denoted as \( n \), the expression for the angle of deviation simplifies to the answer represented in option A. Therefore, A.
\[ D = (n - 1) A \]
where \( n \) is the refractive index of the prism.
Given that the refractive index is denoted as \( n \), the expression for the angle of deviation simplifies to the answer represented in option A. Therefore, A.
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