Explain why :
a body with large reflectivity is a poor emitter.

Explanation

(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 on chilly 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.