In An X-ray Tube, Electrons Accelerated Through A Very High Potential Difference Strike A Metal Target. If The Potential Difference Is Increased, The Speed Of The Emitted X-rays  

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In an X-ray tube, electrons accelerated through a very high potential difference strike a metal target. If the potential difference is increased, the speed of the emitted X-rays  


Correct option is

X-rays, being electromagnetic waves, always travel with the speed of light i.e.,  in vacuum. It is only the energy of the incident electrons (and, therefore, the energy of the emitted X-rays) that depends on the accelerating p.d. The speed of X-rays has nothing to do with this p.d., it is a characteristic only of the medium of propagation. Unlike the case of visible light, the speed of X-rays changes but little with a change in medium (the refractive index of different media for X-rays is very close to unity)



The minimum wavelength of X-rays emitted from an X-ray tube operating at a voltage of 104 volts is roughly equal to  


The energy in monochromatic X-rays of wavelength 1 Å is roughly equal to


What is the unit of Planck’s constant?


What are the dimensions of Planck’s constant?


An X-rays tube produces X-rays whose shortest wavelength is 0.2475 Å. The operating voltage of the tube must be   


X-rays can be diffracted from crystals like the diffraction of light from a grating. The crystal grating for X-rays has a grasting element  


In the continuous part of the spectrum of X-rays the limiting frequency is


An X-ray photon has a wavelength of 0.02 Å. Its momentum is


The potential difference applied to an X-ray tube is increased. As s result, in the emitted radiation, 


The operating voltage in an X-ray tube is 10 kV. The maximum energy of the emitted X-ray photons will be