Question

State the relation between the frequency of radiation emitted by led and band gap of energy

Answer 1

Answer:There is no relation between band gap and wavelength it reflect. Reflection of light depends upon smoothness and colour and texture of reflecting surface.

Explanation:The relation ΔE=hf=hc/λ does not hold here because according to this relation there is the inverse relation between band gap and wavelength and if this is true then metals have no energy gap between valance and conduction band so they should reflect more light then Diamond (which has band gap of 5.5eV) but that is not the case diamond reflects the light more than any metal.