The wavelength of `K_(a)` line copper is `1.5Å`. The ionisation energ – InterviewSolution

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1.	The wavelength of `K_(a)` line copper is `1.5Å`. The ionisation energy of K electron in copper isA. `11.2xx10^(-17)J`B. `12.9xx10^(-16)J`C. `1.7xx10^(-15)J`D. `10xx10^(-16)J`
Answer» Correct Answer - B Required inisation energy , `E=(hc)/(lambda)` `(=6.6xx10^(-34)xx3xx10^(8))/(1.5xx10^(-10))=12.9xx10^(-16)J`

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