A) 35.5 pm
B) 40.0 pm
C) 15.95pm
D) 18.2pm
Correct Answer: A
Solution :
The cut-off wavelength \[\frac{1}{4\lambda }\] corresponds to an electron transferring (approximately) all of its energy to an X-ray photon, thus producing a photon with the greatest possible frequency and least possible wavelength. From relation \[4\lambda \] \[2\lambda \]
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