1.

Wavelength of K_(a). X-ray of an element Aislambda_(1) is and wavelength of K_(a) X-ray element B is lambda_(2) (lambda_(1))/(lambda_(2))is equal to(1)/(4) and Z_(1) and Z _(2)are the atomic numbers of element A and B respectively. Then relation between Z_(1) and Z_(2) are given by

Answer»

 `2Z_(2)-Z_(1)=1` 
`Z_(2)-2Z_(1)=1`
`(Z_(2))/(Z_(1))=4`
`(Z_(1))/(Z_(2))=4`

ANSWER :A


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