Question
Distinguish between conduction, convection and radiation.
✓
Answer
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S. No
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Conduction
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Convection
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Radiation
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1.
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It is the transfer of heat by direct physical contact.
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It is the transfer of heat by the motion of a fluid.
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It is the transfer of heat by electromagnetic waves.
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2.
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It is due to temperature difference. Heat flows from high temperature region to low temperature region.
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It is due to difference in density. Heat flows from low density region to high density region.
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It occurs from all bodies at temperatures above 0K.
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3.
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It occurs in solids through molecular collisions, without actual flow of matter.
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It occurs in fluids by actual flow of matter.
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It can take place at large distances and does not heat the intervening medium.
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4.
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It is a slow process.
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It is also a slow process.
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It propagates at the speed of light.
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5.
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It does not obey the laws of reflection and refraction.
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It does not obey the laws of reflection and refraction.
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It obeys the laws of reflection and refraction.
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