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The amount of energy required (in eV)  to excite an electron from 3rd to 4th orbit of hydrogen atom:

Option: 1

0.66


Option: 2

0.62


Option: 3

0.54


Option: 4

0.85


Answers (1)

best_answer

Paschen Series -

\frac{1}{\lambda }= R\left ( \frac{1}{3^{2}}- \frac{1}{n^{2}} \right )

\left ( infrared \right )

 \Delta E=\frac{hc}{\lambda }=Rhc \left ( \frac{1}{3^{2}}-\frac{1}{4^{2}} \right )

            =13.6\left (\frac{1}{9}-\frac{1}{16} \right )eV

              =13.6\frac{7}{144}eV=0.66 \ eV 

 

Posted by

Gunjita

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