Question

First how are infrared waves produced write their one important use second the thin ozone layer on top of the stratosphere is crucial for human survival why

Answer 1

This is the radiation produced by the motion of atoms and molecules in an object. ... When an object is not quite hot enough to radiate visible light, it will emit most of its energy in the infrared.

Use. One of the most common uses of infrared radiation is in heat-sensitive thermal imaging cameras. These can be used to study human and animal body heat patterns, but more often, they are used as night-vision cameras

The small ozone layer on the top of the atmosphere is crucial for human survival because it absorbs harmful ultraviolet radiations present in sunlight and prevents it from reaching the Earth's surface.