Physics

Problem

The potential energy between two nucleons separated by a distance

r

is written as

U(r)=\dfrac{g^{2}}{4\pi}\,\dfrac{e^{-r/\lambda}}{r},

where

g

is dimensionless and

\lambda

is an unknown constant. The dimensional formula of

\lambda

is a)

[T]

[L]

c) Dimensionless d)

[M^{-1}L^{2}]