Question 572: Atoms & Nuclei

Question

Hydrogen atom in ground state is excited by a monochromatic radiation of $$\lambda $$ = 975 $$\mathop A\limits^ \circ  $$. Number of spectral lines in the resulting spectrum emitted will be

Accepted Answer

Energy of radiation :
E = $${{12375} \over {975}}$$ = 12.7 eV
After absorbing a photon of energy 12.75 eV, the
electron will reach to third excited state of energy
Ã¢ÂÂ0.85 eV, since energy difference corresponding to
n = 1 and n = 4 is 12.75 eV.
$$ 	herefore $$ Number of spectral lines emitted
= $${{n\left( {n - 1} ight)} \over 2} = {{4\left( {4 - 1} ight)} \over 2}$$ = 6

Answer

3

Answer

2

Answer

6

Answer

0 10

Atoms & Nuclei

Hydrogen atom in ground state is excited by a monochromatic radiation of $\lambda = 975 \mathop A\limits^ \circ $. Number of spectral lines in the resulting spectrum emitted will be

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