Calculate the wave length of photon having energy 2'ev.

Calculate wavelength of a photon having energy 1.2 ev. (1 ev = 1.601 xx 10^(-19) Joule)

Calculate the wavelength of a photon (in nm) having enerrgy of 1eV.

Calculate the frequency nad wave length of the energy emitted when the electron jumps from 4th orbit to 1st orbit of a H-atom.

Calculate the wave length of two lines H_alpha and H_beta of Balmcr series. R= 109670 cm^-1

The momentum of photon having 6Mev energy is

Calculate the wave length in.angsfrom of the photon emitted when an electron returns to 2nd orbit from third orbit in the hydrogen atom. Given ionisation energy of hydrogen = 2.17 xx 10^(-11) erg /atom , h = 6.62 xx 10^(-27) erg sec.

The ground state energy of hydrogen atom is -13.6 eV . If an electron makes a transition from an energy level -0.85 eV to -3.4 eV, calculate the wavelength of the spectral line emitted . To which series of hydrogen spectrum does this wavelength belong ?

Calculate the energy of 1 Millimole of photon having wavelength 405nm

The ground state energy of hydrogen atom is -13.6 eV . If an electron makes a transition from an energy level -1.51 eV to -3.4 eV, calculate the wavelength of the spectrum line emitted and name the series of hydrogen spectrum to which it belongs.

A bulb emits 2 xx 10^20 photons of wave length 400 nm in one second. Calculate the rate of emission of photons per second.