In one of the printed docunent the unit of universal gravitational constant is given Nm2kg-2.Check its correctness for dimension analysis.

It is correct

Explanation:

Given dimension is:

                            Nm² kg⁻²

To find the dimension of the universal gravitational constant, let us state the law of universal gravitational constant.

"every particle attracts every other particle with a force that is directly proportional to their masses and inversely proportional to the mass between them".

  F =

F is the force

G is the universal gravitation constant

m is the mass

r is the distance between them

Using the dimension;

          N  =

         Nm² = Gkg²

  Unit of G = Nm² kg⁻²

you'd use the equation that establishes a relationship between  energy  and  wavelength, which looks like this

e=h⋅cλ, where

λ  - the wavelength of the photon; c  - the speed of light, usually given as  3⋅108m/s; h  -  planck's constant, equal to  6.626⋅10−34j s

plug the value you were given for the energy of the photon in the above equation to get the wavelength

e=h⋅cλ⇒λ=h⋅ce

λ=6.626⋅10−34js⋅3⋅108ms−1.257⋅10−24j=1.581⋅10−1m