1.

The vapours of Hg absorb some electrons accelerated by a potential difference of 9.0 eV, as a result of which, light is emitted. If the 25% of energy of a single incident electron is supposed to be converted into light emitted by a single Hg atom, find the wave number 1λ of the light.(Take: Planck's constant (h) =6.6×10−34 Js)

Answer»

The vapours of Hg absorb some electrons accelerated by a potential difference of 9.0 eV, as a result of which, light is emitted. If the 25% of energy of a single incident electron is supposed to be converted into light emitted by a single Hg atom, find the wave number 1λ of the light.



(Take: Planck's constant (h) =6.6×1034 Js)



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