Calculate the wavelength of a photon of energy 10 eV.

Calculate the de Brogilie wavelength of a proton having kinetic energy 50 eV. (m_p = 1.67 xx 10^-27 kg. h = 6.62 xx 10^34J-s)

Calculate the de-Broglie wavelength of a proton having K.E. 50eV .

Calculate the energy of the photon of wave-length 4500A. Given h= 6.6xx10^(-34) J sec.

Calculate the wavelength and energy of radiation emitted for the electronic transition from infinity (infty) to stationary state of one of hydrogen atom.

Calculate the energy of photon having frequency of 1.0xx10^15 sec^(-1) (Planck's of 1.0XX10^15 sec^(-1) )