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Name: jaclyn chua
Also: in 3a2.
hi, yes yes so this is my physics notes and first aid blog. which hopefully by the end f the holidays would cover most of the topics needed and all the importatnt notes and exercises needed for revision.
the notes are still being updated. the late updates are due to house under renovation and being ill for a long time so please excuse the lack of posts T_T they'll be all up veryvery very soon...
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radiation
radiationthe third mode of heat transfer is radiation. radiation is the means by which heat in the form of infrared rays from the sun reaches the earth. this process does not require a material medium. therefore heat energy can pass through by radiation. all bodies above absolute zero radiate infra-red radiations
when these radiation fall on other objects, they may be reflected or absorbed, thus raising the temperature of the object
good and bad absorbers black and dull surfaces = good absorber and good emittershiny and polished surfaces = bad absorber and bad emitter
posted by supermassive on Wednesday, June 24, 2009
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