P1.1.1 - AQA GCSE Physics Unit 1

P1.1.1	Infrared radiation
	a) All objects emit and absorb infrared radiation	Infra red is part of the electromagnetic spectrum. 'Hotter' refers to temperature. be careful not to confuse heat and temperature.
	b) The hotter an object is the more infrared radiation it radiates in a given time.
	c) Dark, matt surfaces are good absorbers and good emitters of infrared radiation.	This relates to work done on colour and reflection at KS3. see heat sinks
	d) Light, shiny surfaces are poor absorbers and poor emitters of infrared radiation.
	e) Light, shiny surfaces are good reflectors of infrared radiation.