Heat Radiation

Heat Radiation

Heat Is Transferred In Three Different Ways. 1) Radiation 2) Conduction 3) Convection
1. RADIATION is the transfer of heat energy by INFRARED RADIATION
2. CONDUCTION is the main form of heat transfer in SOLID
3. CONVECTION is the main form of transfer in LIQUIDS AND GASSES
4. The BIGGER THE TEMPERATURE DIFFERENCE between a body and its surroundings, the FASTER ENERGY IS TRANSFERRED BY HEATING.
INFRARED RADIATION- EMISSION of ELECTROMAGNETIC WAVES
1. ALL OBJECTS are CONTINUALLY giving and absorbing infrared radiation
2. The HOTTER an object is, the MORE radiation it radiates in a GIVEN TIME.
3. You can FEEL the INFRARED RADIATION if you stand near something HOT e.g a fire
4. An object that's HOTTER than it's surrounding EMITS MORE RADIATION than it ABSORBS (as it COOLS down)
5. An object that's COOLER than it's surroundings ABSORBS MORE RADIATION than it EMITS (as it WARMS up)
RADIATION DEPENDS ON SURFACE COLOUR AND TEXTURE
1. DARK, MATT surfaces ABSORB infrared radiation
2. LIGHT, SHINY surfaces REFLECT infrared radiation

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	Created by rashmithapa678 almost 11 years ago