ATAR Notes: Forum
HSC Stuff => HSC Science Stuff => HSC Subjects + Help => HSC Physics => Topic started by: Albertenouttaten on October 29, 2016, 04:15:19 pm
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Hi, I realise that a blackbody is an ideal object that perfectly absorbs and emits radiation over all wavelengths. My question is. When the blackbody absorbs incident radiation, is the consequence of this event an increase in the temperature of the blackbody? Which then inturn releases radiation in the form of thermal radiation?
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Hi, I realise that a blackbody is an ideal object that perfectly absorbs and emits radiation over all wavelengths. My question is. When the blackbody absorbs incident radiation, is the consequence of this event an increase in the temperature of the blackbody? Which then inturn releases radiation in the form of thermal radiation?
Hey! This is essentially correct. A black body in equilibrium with its surroundings will emit as much thermal radiation as it absorbs (assuming it is a perfect black body). If it absorbs more than it emits, we get a rise in temperature. If it emits more than it absorbs, we get a fall ;D