ALL PHYSICS 1

HEAT RADIATION

Heat is Transferred in Different Ways

  • Conduction - Happens in solids
  • Convection - happens in liquids and gases
  • Radiation - is the transfer of heat energy throung infrared radition (IR.)

Infrared radiation

  • Emitting means to give out and absorbing means too take in IFRARED RADIATION

Hotter object = more it radiates         hotter the surrondings = emits more readiation that it absorbs

Coller than its surrondings = absorbs more readiation than it emits

BIGGER THE TEMPERATURE DIFFERENCE THE FASTER THE HEAT IS TRANSFERED.

Dark matt surfaces are good absorbers and emmitters of energy.

Light, shiny surfaces are poor absorbers and poor emitters of infared radiation

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CONDUCTION

Conduction

CONDUCTION OF HEAT IS WHERE VIBRATING PARTICLES PASS ON THEIR ENERGY TO THEIR ENERGY TO THE PARTICLES NEXT TO THEM.

Materials ith their particles close together are conductors. This means that are more likely too COLLIDE

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CONVECTION

Convection                         LIQUIDS AND GASES

CONVECTION HAPPENS WHEN THE PARTICLES WITH THE MOST ENERGY MOVE FROM THE HOTTER PLACE TO THE COOLER PLACE TAKING THE HEAT ENERGY WITH THEM.

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