If an electron in a hydrogen atom jumps from the 3rd orbit to the 2nd orbit, it emits a photon of wavelength $\lambda $. When it jumps from the 4th orbit to the 3rd orbit, the corresponding wavelength of the photon will be

Question

If an electron in a hydrogen atom jumps from the 3^rd orbit to the 2^nd orbit, it emits a photon of wavelength $\lambda $. When it jumps from the 4^th orbit to the 3^rd orbit, the corresponding wavelength of the photon will be

${{16} \over {25}}\lambda $

${9 \over {16}}\lambda $

${{20} \over 7}\lambda $

${{20} \over {13}}\lambda $

Solution

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