What is the momentum of electron beam of wavelength 4Å? `(h=6.62xx10^(-34)Js)`

Find the momentum of an electron having wavelength 2A^(0)(h=6.62xx10^(-34)Js)

Find the momentum of an electron having wavelength 2A^(0)(h=6.62 xx 10^(-34)Js)

Calculate the momentum of electrons if their wavelengths is 2Å . Given : h = 6.626 xx 10^(-34) Js and m = 9.1 xx 10^(-31) kg

With what velocity must an electron travel so that its momentum is equal to that of a photon with a wavelength of 5000Å(h=6.6xx10^(-34)Js,m_(e)=9.1xx10^(-31) Kg)

An electron hole pari is formed when light of maximum wavelength 6000 Å is incident on the semiconductor. What is the band gap energy of the semiconductor ? (h=6.62xx10^(-34)Js)

Find the energy fo photon in watt-hour for electromagentic waves of wavelength 3000 Å. Given h=6.6 xx 10^(-34) "Js".