^Ultraviolet light

(a) Produced by special lamps like mercury and iron are lamps and by very hot bodies like sun.

(b) Properties: Effect on photographic plate, fluorescence, ionization, highly energetic, tanning of the human skin.

(c) Used

1. To destroy bacteria and for sterilizing the surgical instruments
2. In the detection of forged documents finger prints
3. In burglar alarms etc as they can cause photoelectric effect.
4. For studying fluorescence
5. In the study of molecular structure and arrangement of electrons
6. To prevent the food stuff.