EVERYDAY SCIENCE

Detailed explanation-1: -All objects emit electromagnetic radiation according to their temperature. Colder objects emit waves with very low frequency (such as radio or microwaves), while hot objects emit visible light or even ultraviolet and higher frequencies.

Detailed explanation-2: -A black hole by definition does not emit radiation.

Detailed explanation-3: -Since the primary source of infrared radiation is heat or thermal radiation, any object which has a temperature radiates in the infrared. Even objects that we think of as being very cold, such as an ice cube, emit infrared.

Detailed explanation-4: -Thermal radiation is emitted by all matter with temperatures above the absolute zero and is transferred in the form of electromagnetic waves. The thermal radiation of an object is dependent on its emissivity.

Detailed explanation-5: -All bodies (objects) emit and absorb infrared radiation . They do this whatever their temperature .