Question

What is the energy of photon whose wavelength is 6840 A? (a) 1.81 eV (b) 3.6 eV (c) 13.6 eV (d) 12.1 eV

Answer 1

What is the energy of a photon whose wave length is 6840∘A6840∘A

1.81ev3.6ev−13.6ev12.11ev




Solution :

E=hγE=hγ

=hcλ=hcλ

=124008840=124008840

=1.81ev

Answer 2

option (a) is the correct answer