An electron of mass m and a photon have same energy E. The

An electron of mass m and a photon have same energy E. The ratio of de-Broglie wavelengths associated with them is :

For electron De-Broglie wavelength,

λ_e =	h
	√2 mE

For photon E = pc
⇒ De-Broglie wavelength,

λ_Ph =	hc
	E

∴	λ_e	=	h	×	E
	λ_Ph		√2mE		hc

=		13.6		^1/2	1
		2m			e