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Certain substance emits only the wavelen...

Certain substance emits only the wavelengths `lamda_1,lamda_2,lamda_3` and `lamda_4` when it is at a high temperature, it will absorb only the following wavelengths

A

`lambda_(1)`

B

`lambda_(2)`

C

`lambda_(1)` and `lambda_(2)`

D

`lambda_(1),lambda_(2),lambda_(3)` and `lambda_(4)`

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The correct Answer is:
D
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ERRORLESS -TRANSMISSION OF HEAT-Radiation (General, Kirchoff s law, Black body)
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  2. For a perfectly black body, its absorptive power is

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  4. Compared to a person with white skin another person with dark skin wil...

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  5. Relation between emissivity e and absorptive power a is (for black bod...

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  6. Which of the following statements is wrong ?

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  7. Half part of ice block is covered with black cloth and rest half is co...

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  8. If between wavelength lambda andlambda + dlambda, e(lambda) and a(lamb...

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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. Distribution of energy in the spectrum of a black body can be correctl...

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  11. In rainy season, on a clear night the black seat of a bicycle becomes ...

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

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  13. At a certain temperature for given wavelength, the ratio of emissive p...

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  14. The cause of Fraunhoffer lines is

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  15. Two thermometers A and B are exposed in sunlight. The bulb of A is pai...

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  16. There is a black spot on a body. If the body is heated and carried in ...

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  17. When red glass is heated in dark room it will seem

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  18. A hot body will radiate maximum energy if its surface is

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  19. A body, which emits radiations of all possible wavelengths, is known a...

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  20. Which of the following is the example of ideal black body?

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