The unit of solid angle is steradian. What is the dimensional formula for steradian?

Options

A. `[L^(1)M^(1)T^(-1)]`
B. `[L^(0)M^(0)T^(0)]`
C. `[L^(2)M^(-1)T^(1)]`
D. `[L^(-2)M^(1)T^(0)]`

Answer

b

Explanation

Angle has no dimensions. Hence the dimensional formula is `[L^(0)M^(0)T^(0)]`.