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Characteristic X-rays of frequency 4.2x...

Characteristic X-rays of frequency `4.2xx10^18` Hz are produced when transitions from L-shell to K-shell take place in a certain target material. Use Mosley's law to determine the atomic number of the target material. Given Rydberg constant `R =1.1xx10^7 m^(-1)`.

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The correct Answer is:
`42`
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frequency of a photon emitted due to transition of electron of a cerrain 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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