Visible light : Visible light emitted or reflected from objects around us provides information about the world. The wavelength range of visible light is 4000 Angstrom to 8000 Angstrom.
(i) They are used to destroy the bacteria and for sterilizing surgical instruments.
(ii) These radiations are used in detection of forged documents, finger prints in forensic laboratories.
(iii) They are used to preserve the food items.
(iv) They help to find the structure of atoms.
X rays :
(i) X rays are used as a diagnostic tool in medicine.
(ii) It is used to study the crystal structure in solids.
Gamma rays : Study of gamma rays gives useful information about the nuclear structure and it is used for treatment of cancer.