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Frequency of a photon emitted due to tra...

Frequency of a photon emitted due to transition of electron of a certain element from `L to K `shell is found to be `4.2 xx 10^(18) Hz` Using Moseley 's law, find the atomic number of the element , given that the Rydberg's constant `R = 1.1 xx 10^(7) m^(-1)`

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The correct Answer is:
`42`
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PHYSICS GALAXY - ASHISH ARORA-X-RAYS-Unsolved Numerica Problem for Preparation
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