Match the different types of Electro Magnetic Waves and their detections

Choose the correct answer from the options given below:

A-III, B-IV, C-I, D-II

A photocell is a resistor that changes resistance depending on the amount of light incident on it.

Thermopile IR Sensors are used for non-contact, or infrared, surface temperature measuring.

Receiving aerial's  - a device for reception of radiofrequency (RF) A receiving antenna performs the reverse of the process performed by the transmission antenna. It receives radiofrequency radiation and converts it into electric currents in an electric circuit connected to the antenna.

Point contact diodes are the old microwave semiconductor devices that are used in microwave receivers and also used as detectors & receiver mixers