X - Rays
X - Rays: Overview
This topic covers concepts, such as Applications of X-rays, X-ray Spectrum, X-ray, Production of X-rays in Coolidge Tube, Cathode Rays, Discharge Tube, etc.
Important Questions on X - Rays
If only of the energy supplied to a Coolidge tube is converted into ray beam, then calculate the energy carried by the rays, if the potential difference across the tube is and current flows through the voltage supply.

If a Coolidge tube is operated at potential difference of , minimum wavelength of rays produced is:


Which of the following is the wave length of X-ray:



In X-ray tube, wavelength of X-ray is the characteristic of :-

The energy of characteristic rays photon obtained from Coolidge tube comes from:-


50% of X-rays obtained from a Coolidge tube pass through 0.3 mm. thick aluminium foil. If the potential difference between the target and the cathode is increased, then the fraction of X-rays passing through the same foil will be :-

Which of the following results is correct, if the potential difference between the anode and cathode of the -ray tube increases ?


The voltage applied to the Coolidge -ray tube is increased by . As a result, the short wave limit of continuous -ray spectrum shifts by . The initial voltage applied to the tube is


The potential difference applied to an X - ray tube is 5 kV and the current through it is 3.2 mA. The number of electrons striking the target per second is .............. (Take )

If the potential difference applied across -ray tube is volts, then approximately minimum wavelength of the emitted -rays will be

Figure shows the intensity-wavelength relations of X-rays coming from two different Coolidge tubes. The solid curve represents the relation for the tube A in which the potential difference between the target and the filament is VA and the atomic number of the target material is ZA. These quantities are VB and ZB for the other tube. Then,

The -line of singly ionized calcium has a wavelength of as measured on earth. In the spectrum of one of the observed galaxies, this spectral line is located at . The speed with which the galaxy is moving away from us, will be


The filament current in the electron gun of a coolidge tube is increased while the potential difference used to accelerate the electrons is decreased. As a result, in the emitted radiation
