Question

State the uses of ultraviolet radiation.

Answer 1

1. They are used in testing the purity of gemstones.
2. They are used in the sterilisation of water and medical instruments.
3. They are used in identifying adulteration in food, such as ghee and egg.
4. They are used in the detection of forgery. Ultraviolet lamps can detect invisible writings, forged bank notes and so on.