Question

State the properties of ultraviolet radiation.

Answer 1

1. They travel in a straight line.
2. They can be reflected and refracted.
3. They travel with a speed of 3 × 10⁸ m/s in air or vacuum.
4. They produce fluorescence while falling on a zinc sulphide screen.
5. They are scattered by tiny dust particles in the atmosphere.
6. They are chemically more active when compared with visible light and affect the photographic plate.
7. They are absorbed by glass; however, they can pass through quartz. Therefore, in ultraviolet bulbs, the outer envelope is made of quartz.
8. They do not produce a heating effect.