Infrared radiation is detected by

Infrared radiation are detected by:

Consider the following types of electromagnetic radiation: radiowaves, infra-red, vissible light. Which of the following statements are correct? (i) Only radiowaves can be used to transmite audio information. (ii) Only infrared radiation is emitted by very hot object. (iii) Only visible light can be detect by humans.

Infrared radiation are

Global warming of the atmosphere due to trapping of long infrared radiations is called :