(i) Compton Effect: When a monochromatic beam of X-rays are incident on a scattering substance then the scattered X-rays contain radiation not only of the same wavelength as that of the primary rays but also the radiations of longer wavelength. This is called Compton effect.
(ii) (1) Intensity: In order to increase the intensity of X-rays the current through the tube must be increased.
(2) Penetration Power: It can be increased by increasing the potential difference applied between the ends of the X-ray tube.