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Obtain the expression for the ratio of the de-Broglie wavelengths associated with the electron orbiting in the second and third excited states of hydrogen atom.

Answers (1)

R rishi.raj

$2\pi r_n=n\lambda...........(1)$

For hydrogen atom Z=1

$r_n\propto n^2..................(2)$

from (1) and (2)

$\lambda\propto n..................(2)$

for second exited state n=3 and for third exited state n=4

Therefore the ratio of the de-Broglie wavelengths associated with the electron orbiting in the second and third excited states of the hydrogen atom is 3/4

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