Consider electrons accelerated using a potential difference of 25.5 kV before hitting a metal surface. Calculate...
Consider electrons accelerated using a potential difference of 25.5 kV before hitting a metal surface. Calculate the minimum wavelength of the emitted x-rays. Give your answer in pm and with 3 significant figures.
Homework Answers
E = q* V
= (1.6*10^-19)*(25.5*10^3)
= 4.08*10^15 J
Now use:
E = h*c/wavelength
wavelength = h*c/E
= (6.626*10^-34)*(3*10^8)/(4.08*10^15)
= 4.87*10^-11 m
= 48.7 pm
Answer: 48.7 pm
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