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Stefan-Boltzman's Law

Four pieces o...

Question

Four pieces of iron heated in a furnace to different temperatures show different colours listed below. Which one has the highest temperature

A

White

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B

Yellow

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C

Orange

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D

Red

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Solution

The correct option is A
White

At low temperature short wavelength radiation is emitted. As the temperature rise colour of emitted radiation are in the following order

Red(r)Yellow(r)Blue(r)White (at highest temperature)

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