21 A 100 eV electron collides with a stationary helium ion He in its ground...

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21 A 100 eV electron collides with a stationary helium ion He in its ground state and exits to a higher level After the collision He ions emits two photons in succession with wavelength 1085 and 304 The energy of the electron after the collision will be eV Given h 6 63 x 10 Js 34

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21 A 100 eV electron collides with a stationary helium ion He in its ground state and exits to a higher level After the collision He ions emits two photons in succession with wavelength 1085 and 304 The energy of the electron after the collision will be eV Given h 6 63 x 10 Js 34

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