(a) Why are solar heating devices painted black ?
(a) Why are solar heating devices painted black ?
(b) Name two such devices and state two limitations of these.
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(a) Black bodies are good absorbers of heat, so temperature rises quickly.
(b) Two devices-solar cooker, Solar water heater.
Two limitations :
(i) Cannot be used at night.
(ii) Heating process is very slow.
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