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Question

Physics Question on Waves

The X-ray tube is operated at 50 kV.50 \,kV. The minimum wavelength produced is

A

0.5 �0.5 \,�

B

0.75 �0.75 \,�

C

0.25 �0.25 \,�

D

1.0 �1.0 \,�

Answer

0.25 �0.25 \,�

Explanation

Solution

II II II λ=hceV=6.6×10−34×3×1081.6×10−19×50×103\lambda=\frac{h c}{e V}=\frac{6.6 \times 10^{-34} \times 3 \times 10^{8}}{1.6 \times 10^{-19} \times 50 \times 10^{3}} λ=19.8×10−2680×10−16\lambda =\frac{19.8 \times 10^{-26}}{80 \times 10^{-16}} =0.25 �=0.25 \,�