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
