The potential energy between two nucleons separated by a distance is written as U(r)=…

PHYSICS · Single correct · A Level · Physics · Measurements and their errors · Measurements and their errors

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]

(b)

[L]

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