Question

Q.30- Define radiation. Give any two examples where heat is transferred by radiation.
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Q.31- Name the most common silk moth .What are the characteristic of silk fibre obtain from the cocoons of this silk moth?
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Answer 1

30.Radiation the method of transferring heat through vacuum without any medium.

e.g., sun's rays reaching earth.

        microwaves, radio waves.

31.The most common silk moth is mulberry silk moth and its silk fibres are soft, lustrous, and elastic and can be dyed in beautiful colors.