The vapours of Hg absorb some electrons accelerated by a potential dif – InterviewSolution

1.	The vapours of Hg absorb some electrons accelerated by a potential difference of 4.5 eV, as a result of which, light is emitted. If the full 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 $H g$ absorb some electrons accelerated by a potential difference of $4.5 eV$ , as a result of which, light is emitted. If the full energy of a single incident electron is supposed to be converted into light emitted by a single $H g$ atom, find the wave number $\frac{1}{λ}$ of the light. (Take: Planck's constant (h) = $6.6 \times 10^{- 34} J s$ )

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