Which element has a ` K_(alpha)` line of wavlength 1.785Å ?A. CopperB – InterviewSolution

InterviewSolution

1.	Which element has a ` K_(alpha)` line of wavlength 1.785Å ?A. CopperB. cobaltC. SodiumD. Aluminium
Answer» Correct Answer - B We know that, `(1)/(lambda_(k_alpha))=R(Z-1)^(2)((1)/(1^(2))-(1)/(2^(2)))` `" " (Z-1)^(2)=(4)/(3)xx(1)/(lambda_(k_(alpha))R)=680` `" " (Z-1)=26` `" " Z=27to` cobalt

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