Question

Which is the most common use for infrared waves?

to determine relative distance
to provide heat
to carry cell phone conversations
to transmit signals

Answer 1

To provide Heat

Step-by-step explanation:

Gradpoint question

Answer 2

Answer : To provide heat.

Explanation :

Infrared waves are the waves having wavelength 700 nm to 1 mm.

The most common use of infrared waves is "to provide heat" i.e. in heat-sensitive thermal imaging cameras. It is a invisible wave. It can only sensed by a sensation of warmth.

For example :

When an object is hot, It will emit energy in the form of infrared waves.

So, correct option is (b)