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1.
An X-ray tube with a copper target emits 
line of wavelength 
What should be the minimum voltage through which electrons are to be accelerated to produce this wavelength of 
rays
line of wavelength What should be the minimum voltage through which electrons are to be accelerated to produce this wavelength of rays2.
A photon in motion has a mass
3.
The intensity of X-rays from a coolidge tube is plotted against wavelength 
as shown in figure. The minimum wavelength found is 
and the wavelength of 
like is 
. As the accelerating voltage is increased
as shown in figure. The minimum wavelength found is and the wavelength of like is . As the accelerating voltage is increased