Q.
The wavelength of Kα line in copper is 1.54 Ao. The ionisation energy of K electron in copper in Joule is
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a
11.2×10−27
b
12.9×10−16
c
1.7×10−15
d
10×10−16
answer is B.
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Detailed Solution
Required ionisation energy =hcλ=6.6×10−34×3×1081.54×10−10J=12.9×10−16J
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