Calculate the energy of a photon, in electron-volt (eV) and in watt-hour (W h), of wavelength 6600 Å.
None of these
The energy of a photon of frequency v is hv. But , where c is the speed light and is the wavelength of the photon. Hence the energy of the photon is given by
= 1.875 eV.
An X-rays photon of wavelength and frequency v collides with an electron and bounces off. If are respectively the wavelength and frequency of the scattered photon, then
The binding energy of the innermost electron in tungsten is 40 keV. To produce characteristics X-rays using a tungsten target in an X-ray tube, the accelerating voltage should be greater than
X-rays of wavelength are incident normally on a crystal and the second order reflection on diffraction from the crystal observed at an angle of 45o. The lattice constant of the crystal is
The frequency of line of a source of atomic number Z is proportional to
A direct X-ray photograph of the intestines is not generally taken by the radiologists because :
X-rays which can penetrate through longer distance in substances are called.
The target in an X-rays tube should be a:
The maximum frequency of the X-rays produced in an X-ray tube
Which one of the following parameters of the emitted X-rays increases when the potential difference between the electrodes of an X-ray tube is increased?
An X-rays tube produces a continuous spectrum of radiation with its short wavelength end at 0.45 Å. What is the maximum energy of a photon in the radiation? What is the order of accelerating voltage (for electrons) required in such a tube?