Atomic StructureHard
Question
The vapours of Hg absorb some electron accelerated by a potential difference of 5.0 V as a result of which light is emitted. If the full energy of single incident electron is supposed to be converted into light emitted by single Hg-atom, then the wavelength of the emitted light is
Options
A.2480 nm
B.248 nm
C.6200 nm
D.620 nm
Solution
$\lambda = \frac{1240}{5} = 248\text{ nm}$
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