P1.1.1 Infrared Radiation

Question 1

All _ _ _ _ _ _ _ _ _ _ _ and _ _ _ _ _ _ infrared radiation.

Answer 1

All objects emit and absorb infrared radiation.

Question 2

The _ _ _ _ _ _ an object is the _ _ _ _ infrared radiation it radiates in a given time.

Answer 2

The hotter an object is the more infrared radiation it radiates in a given time.

Question 3

Which features allow surfaces to be good absorbers and good emitters of infrared radiation?

Answer 3

Dark, matt surfaces are good absorbers and good emitters of infrared radiation.

Question 4

Which features allow surfaces to be poor absorbers and poor emitters of infrared radiation?

Answer 4

Light, shiny surfaces are poor absorbers and poor emitters of infrared radiation.

Question 5

Which features allow surfaces to be good reflectors of infrared radiation?

Answer 5

Light, shiny surfaces are good reflectors of infrared radiation.

Question 6

An object that’s hotter than it’s surroundings _ _ _ _ _

_ _ _ _ radiation than it _ _ _ _ _ _ _ (as it cools down).

Answer 6

An object that’s hotter than it’s surroundings emits more radiation than it absorbs (as it cools down).

Question 7

An object that’s cooler that it’s surroundings _ _ _ _ _ _ _ _ _ _ _ radiation than it _ _ _ _ _ (as it warms up).

Answer 7

An object that’s cooler than it’s surroundings absorbs more radiation than it emits (as it cools down).