Question

if any light emitting diode Emmetts light of wavelengths 580 nanometer than the energy gap between the valence

Answer 1

Answer:

Given:

λ=662nm

As

Energy gap=E=λhc

E=662×10−96.62×10−34×3×108 (as c=3×108)

E=3×1018V

Hence the correct answer =3×1018V