Question

1. Name the parts of the electromagnetic spectrum which are
   1. also known as heat waves and
   2. absorbed by the ozone layer in the atmosphere.
2. Write briefly one method for each of the production and detection of these radiations.

Answer 1

1.   
   1. Infrared
   2. Ultraviolet
2.      
   1. Production:
      1. Heated bodies radiate infrared rays.
      2. Ultraviolet rays are generated when electric current flows through a gaseous medium referred to as gas discharge.
   2. Detection:
      1. Infrared rays are detected using the point-contact diodes.
      2. Ultraviolet light is detected using the specialised UV detectors.