A) \[{{\lambda }_{1}}={{\lambda }_{2}}={{\lambda }_{3}}\]
B) \[{{\lambda }_{1}}>{{\lambda }_{2}}>{{\lambda }_{3}}\]
C) \[{{\lambda }_{1}}<{{\lambda }_{2}}<{{\lambda }_{3}}\]
D) \[{{\lambda }_{1}}={{\lambda }_{2}}>{{\lambda }_{3}}\]
Correct Answer: A
Solution :
The wavelength of X-rays depends on the atomic number Z. Since, isotopes are the elements which have same atomic number. So, \[{{\lambda }_{1}}={{\lambda }_{2}}={{\lambda }_{3}}\]
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