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
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