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A black body emits...

A black body emits

A

radiations of all wave lenghts

B

no radiation

C

radiation of single wave length

D

radiation of selected wave length

Text Solution

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The correct Answer is:
A
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NARAYNA-TRANSMISSION OF HEAT-C .U .Q
  1. Three bodies A,B,C are at -27^(@)C, 0^(@)C, 100^(@)C respectively The ...

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  2. At high temperature black body spectrum is .

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  3. A black body emits

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

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  5. A black body does not .

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

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

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

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

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  10. The velocity of heat radiation in vacuum is .

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

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

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  13. A star which appears blue will be

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  14. If a star is colder than the Sun it appears

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  15. The amount of radiation emitted by a perfectly black body is proportio...

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  16. At a given temperature the ratio between emissive power and absorptive...

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  17. If the sun become twice hotter it will radiate .

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  18. Three identical shperes of different meterials iron gold and silver ar...

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  19. Cooling graphs are drawn for three liquids a,b and c The specific heat...

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  20. A black body of temperature T is inside a chamber of temperature T(0) ...

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