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The intensity of radiation emitted by th...

The intensity of radiation emitted by the sun has its maximum value at a wavelength of 510 nm and that emitted by the North star has the maximum value at 350 nm. If these stars behave like black bodies, then the ratio of the surface temperatures of the sun and the north star is

A

`1.46`

B

`0.69`

C

`1.21`

D

`0.83`

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The correct Answer is:
B
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MOTION-HEAT - 1-EXERCISE - 1 Objective Problems | JEE Main
  1. From a black body, radiation is not :

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  2. In accordance with Kirchhoff’s law. Which of the following is incorrec...

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  3. The energy radiated by a body does not depends on

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  4. A polished metallic piece and a black painted wooden piece are kept i...

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  5. Nature of thermal radiations is similar to the nature of -

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  6. Heat radiation exhibit the phenomenon of polarization which means that...

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  7. Following is not a property of radiation –

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  8. Transfer of heat in friction is by –

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  9. Which of the following surface will emit least heat radiation –

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  10. Emissive power of any surface (e), Absorptive power (a), Reflecting po...

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  11. A black metal foil is warmed by radiation from a small sphere at tempe...

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  12. Two bodies P and Q have thermal emissivities of varepsilon(P) and vare...

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  13. The rate of emission of radiation of a black body at 273^(@)C is E, th...

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  14. The power radiated by a black body is P, and it radiates maximum energ...

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  15. Spheres P and Q are uniformally constructed from the same material whi...

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  16. A solid sphere and a hollow sphere of the same material and of equal r...

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  17. The rate of cooling of a body by radiation depends on :

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  18. Two metallic sphere A and B are made of same material and have got ide...

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  19. Stars S(1) emits maximum radiation of wave length 420nm and the star S...

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  20. The intensity of radiation emitted by the sun has its maximum value at...

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