(a) Production of infrared waves:
● Any object having temperature emits infrared (even ice emits infrared).
● Sun is a source of infrared.
● Infrared is produced by Nernst lamp, infrared laser etc.
Infrared waves are heat waves:
● It increases the vibration of atoms of the substances on which it falls and thus increases the internal energy and temperature of the substance.
Uses of infrared:
● It is used for photography at night and through fog.
● It is used for relieve of muscular pain.
OR(b) Production of X-rays:
●X-rays are produced when high energy electron beam bombards metallic target of high melting and point heavy atomic weight.
●X-ray is produced in Coolidge tube.
Uses of X-ray:
●It is used to photograph bones for the diagnosis of any fracture and dislocation.
● It is used to radiotherapy to destroy cancerous cells and to shrink tumors.