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

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 de Broglie wavelength of an electron having kinetic energy 120 eV.

The de Brogilie wavlength of an electron moving with a constant velocity is 0.367 nm. The mass of proton is 1835 times that of an electron. The de Broglie wavelength of a proton moving with the same velocity will be

Calculate the wavelength of a photon of energy 10 eV.