Question

If the X-ray tube is working at 20 kV then the minimum wavelength of X-rays will be

• A. 0.31 $?$
• B. 0.62 $?$
• C. 0.93 $?$
• D. 0.47 $?$

Answer 1

Answer: (B)

0.62 $?$

Answer 2

min. $= \frac{hc}{eV}=\frac{12400}{V}=\frac{12400}{20\,\,10^{3}}=0.62 ?$