An X-ray photon has a wavelength of 0.02 Å. Its momentum is
The first scientist to measure the charge to mass ratio of the electron was
In Thomson’s experiment for determining , the potential difference between the cathode and the anode (in the accelerating column) is the same as that between the deflecting plates (in the region of crossed fields). If the potential difference is doubled, by what factor should the magnetic field be increased to ensure that the electron beam remains undeflected?
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
The potential difference applied to an X-ray tube is increased. As s result, in the emitted radiation,