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Explain why : a body with large reflectivity is a poor emitter. |
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Answer» Solution :(i) This is because a body with LARGE reflectivity is POOR absorber of heat, and poor absorbers of heat are emitters. (ii) When we touch a brass tumber onchilly day, heat FLOWS from our body to the tumbler quickly (as thermal conductivity of brass is very high) and as a result, it appears colder. (iii) On the other hand, as the wood a bad conductor, heat does not FLOW to the wooden tray from our body, on louching it. |
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