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Questions  

The wavelength Kα X-rays produced by an X-ray tube is 0.76 . The atomic number of anticathode material is

a
82
b
41
c
20
d
10

detailed solution

Correct option is B

For KαX -ray line  1λα=R(Z−1)2112−122=3R4(Z−1)2On putting the given values10.76×10−10=34×1.09×107(Z−1)2 ⇒ (Z−1)2≈1600 ⇒Z−1=40 ⇒Z=41

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The wavelength of Kα, X-rays produced by an X-ray tube is 0.76 Ao. The atomic number of the anode material of the tube is ________.


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