Calculate the energy in corresponding to light of wavelength 45nm.

Given that

λ = 45 nm = 45 x 10^-9 m

We need to find

We need to calculate the energy for the given wavelength

We know that

E = hc/λ———-(i)

where

h= Planck’s constant= 6.62607015×10⁻³⁴ Js

c= velocity of light= 3 × 10⁸ m/s

Solution

Substituting the known values in equation (i) we get

E= 6.62607015×10⁻³⁴ X 3 × 10⁸ / 45 x 10^-9

E= 4.42 × 10⁻¹⁸ Joules

Hence energy for the given wavelength is 4.42 × 10⁻¹⁸ Joules