The angle of minimum deviation is the angle at which a ray of light passing through a prism is deviated the least. It is denoted by the symbol Dm.


- Angle of minimum deviation (Dm) = 36°
- Refractive index of the prism material (n) = 1.5


The angle of prism (A) can be determined using the formula:

A = (Dm + A) - 180°

where Dm is the angle of minimum deviation and A is the angle of prism.


Let's substitute the given values into the formula:

A = (36° + A) - 180°


Rearranging the equation, we have:

A - A = 36° - 180°

0 = -144°

This means that the angle of prism (A) cannot be negative. Hence, the given information is incorrect or inconsistent.

However, if we assume that the angle of minimum deviation (Dm) is 36° but in the opposite direction, we can proceed with the calculation.


Assuming the angle of minimum deviation (Dm) is -36°:

A = (-36° + A) - 180°

Simplifying the equation:

A - A = -36° - 180°

0 = -216°

Again, the angle of prism (A) cannot be negative.


Based on the given information, it is not possible to determine the angle of prism accurately. The given values may be inconsistent or incorrect. Further clarification or additional information is required to solve the problem correctly.