Modern Physics 4 Question 28
29. A potential difference of $20 kV$ is applied across an X-ray tube. The minimum wavelength of $X$-rays generated is ……. $\AA$.
(1996, 2M)
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Solution:
- $\lambda _{\text {min }}($ in $\AA)=\frac{12375}{V(\text { in volts })}$
$$ \lambda _{\min }=\frac{12375}{20 \times 10^{3}}=0.62 \AA $$
