Physics Revision - Radiation

  • Created by: Ella1500
  • Created on: 26-02-15 20:45
How does convection work?
As the temperature of a fluid (liquid or gas) is increased the particles gain kinetic energy and move about more. Cold air takes the place of the hot air. The hot air rises up and cools and sinks
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What are the 3 types of energy transfer?
Conduction, convection, radiation
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How do you stop Conduction?
wrap insulating materials around the object.
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How do you stop Convection?
Create a vacuum, trap air
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How o you stop radiation
the way to reduce heat loss is by infra red radiation is to use reflective materialsto reflect the radiation back to the object.
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How fast does infra red light travel?
the speed of light
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Does a hot object amit more or less infra red light than it absorbs?
more
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Does a cold object absorb more or less infra red light than it emits?
more
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What is the best absorber?
Matt black
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What is heating and expansion?
As objects are heated up the particles gain energy. This means that they move round or vibrate more and take up more space
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Other cards in this set

Card 2

Front

What are the 3 types of energy transfer?

Back

Conduction, convection, radiation

Card 3

Front

How do you stop Conduction?

Back

Preview of the front of card 3

Card 4

Front

How do you stop Convection?

Back

Preview of the front of card 4

Card 5

Front

How o you stop radiation

Back

Preview of the front of card 5
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