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The wavelength of $\;K_{\alpha}\;$ X-ray produced by X-ray to be is 0.76$A^{0}\;$. The atomic no.of anticathode material is


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Answer : (b) 41
Explanation :
For $\;K_{\alpha}\;$ X-ray line,
$\large\frac{1}{\lambda_{\alpha}}=R\;(z-1)^2 \;[1-\large\frac{1}{2^2}]$
$R=1.097\times10^{7} m$
$\approx 1600$
answered Feb 24, 2014 by yamini.v

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