The ratio of wavelength of \( K_{\alpha} \) lines of \( \mathrm{Mo}...

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The ratio of wavelength of \( K_{\alpha} \) lines of \( \mathrm{Mo}(Z=42) \) and \( C u(Z=29) \) will be
P
(1) 0.466
(2) 2.144
W
(3) 0.683
(4) 1.464
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