An electromagnetic wave of wavelength 'λ' is incident on a photosensitive surface of negligible work function. If 'm' mass is of photoelectron emitted from the surface has de-Broglie wavelength λd, then :

(1) λ = (2m/hc)²
(2) λd = (2mc/h)λ²
(3) λ = (2mc/h)λ²
(4) λ = (2h/mc)λ²