Question

State the properties of infrared radiation.

Answer 1

1. They are transverse waves.
2. They exhibit heat-inducing property.
3. They travel with a speed of 3 × 10⁸ m/s in air or vacuum.
4. They can be reflected and refracted.
5. They do not exhibit fluorescence.
6. They are absorbed by ordinary glass. However, they can travel through rock-salt and quartz.
7. As they have a longer wavelength, they can travel through dust and fog in the atmosphere and are less scattered.
8. They have no effect on the photographic film.