Science = Physics Revision

Infrared Radiation

Key Points:

Infrared radiation is energy transfer by electromagnetic waves

All objects emit infrared radiation

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

Key Words:

Infrared Radiation: Electromagnetic waves between visible light and microwaves in the electromagnetic spectrum

Emit: Give out radiation

Surfaces and Radiation

Key Points:

Dark, mass surfaces emit infrared radiation more quickly that light, shiny surfaces

Dark, mass surfaces absorb infrared radiation more quickly than light, shiny surfaces

Light, shiny surfaces reflect more infrared radiation than dark, matt surfaces

Key Words:

Absorber = A substance that takes in radiation

Emitter = A substance that gives out radiation

Reflector = A surface that reflects radiation

States Of Matter

Key Points:

Flow, shape, volume and density are the properties used to describe each state of matter

The particles in a solid are held next to each other, vibrating in their fixed positions

The particles in a liquid move about at random and are in contact with each other

The particles in a gas move about randomly and are much farther apart than particles in a solid or liquid

Key Words:

Solid = A state of matter

Liquid = A state of matter

Gas = A state of matter

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