Give two uses each of ultraviolet rays and microwaves.

Two uses of ultraviolet rays: Used in preserved food and water filter system to make them bacteria free. Used to sterilise medical instrument. Two uses of microwaves are: Used in radar system. Used to heat food in microwave oven.

Mention two applications each of X-rays and infra-red radiations.

Two applications of X-rays are as follows: It is used in medical industry to determine any cracked bones, joints. It is used in the treatment of cancer as radiation therapy. Two applications of infra-red radiations are as follows: These are used in spectroscopy to detect the functional groups and structure elucidation of a chemical. It is used in night vision devices.