Infrared radiation

Question 1

What is infrared radiation?

Answer 1

The transfer of energy from one place to another by an electromagnetic wave

Question 2

What emits and absorbs infrared radiation?

Answer 2

All objects, the hotter it is the more energy it radiates per second

Question 3

Can it infrared radiation travel through a vacuum?

Answer 3

Yes, yes it can

Question 4

What happens when infrared radiation hits an object?

Answer 4

The energy is either absorbed which increases its heat or it is reflected

Question 5

Good absorbers and emitters?

Answer 5

Dark and matt surfaces

Question 6

Poor absorbers and emitters?

Answer 6

Light and shiny surfaces e.g. The silvering inside a vacuums flask

Question 7

Uses?

Answer 7

infrared heaters give out infrared radiation to heat a room
PIR’s (passive infra red devices), these can be found as part of home security alarm systems
thermal imaging cameras, police helicopters use these cameras to help find people when flying at night
the silvering on the inside of a vacuum flask helps prevent heat loss from coffee in the flask