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Which of the following statements is wro...

Which of the following statements is wrong ?

A

rough surface are better radiators than smooth surface

B

highly polised mirror like surfaces are very good radiators

C

black surfaces are better absobers than white ones .

D

black surfaces are better radiators than white ones .

Text Solution

Verified by Experts

The correct Answer is:
B
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NARAYNA-TRANSMISSION OF HEAT-C .U .Q
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  2. Compared to a person with white skin another person with dark skin wil...

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  3. Which of the following statements is wrong ?

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  4. The physical factor distinguishes thermal radiation from visible light...

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  5. If we place our hand below a lighted electric bulb We feel warmer beca...

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  6. Heating effect of the incoming solar radiation is maximum at local noo...

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  7. The absorptivity of Lamp black and platinum black is .

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  8. Absorptive power of a white body and of a perfectly black body respect...

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  9. Three bodies A,B,C are at -27^(@)C, 0^(@)C, 100^(@)C respectively The ...

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  10. At high temperature black body spectrum is .

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  11. A black body emits

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  12. The best laboratory approximation to an ideal black body is .

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  13. A black body does not .

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  14. If the amount of heat energy received per unit area from the Sun is me...

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  15. The colour of a star is a measure of its .

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  16. A polished metal plate with a rough black spot on it is heated to abou...

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  17. If 'p' calorie of heat energy is incident on a body and absorbs 'q' ca...

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  18. The velocity of heat radiation in vacuum is .

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  19. Distribution of enrgy in the spectrum of a black body can be correctly...

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  20. Four pieces of iron are heated to different are respectively red, yell...

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