A black body does not ____________ radiation?

Related Mcqs:

1. The wavelength at which the maximum monochromatic emissive power occurs for a black body, is (where, T = absolute temperature of the black body)?

   A. αT B. α × 1/T C. α T4 D. Independent of T...

2. A perfect black body is a perfect _____________ of radiation?

   A. Absorber B. Emitter C. Both A. & B. D. Neither A. nor B....

3. Which one gives the monochromatic emissive power for black body radiation ?

   A. Planck’s law B. Kirchhoff’s law C. Wien’s law D. Stefan-Boltzmann law...

4. A black body when hot, emits heat radiation of _____________ wavelengths?

   A. Small B. Large C. All D. One fixed...

5. The rate of emission of radiation by a body does not depend upon the__________________?

   A. Wavelength of radiation B. Surface temperature of the body C. Nature of the surface D. Shape and porosity of the body...

6. While the total emissivity of a perfect black body is unity, the same for a real body is__________________?

   A. 0 B. 1 C. > 1 D. Between 0 and 1...

7. Stefan’s block body radiation law can also be derived from ______________ law?

   A. Kirchoff’s B. Planck’s C. Fourier’s D. None of these...

8. The absorptivity of a grey body at a given temperature _____________ with increasing wavelength of radiation?

   A. Increases B. Decreases C. Remain constant D. May increase or decrease; depends on the material...

9. The thermal radiation emitted by a body is proportional to Tn, where T is its absolute temperature. The value of ‘n’ is exactly 4 for__________________?

   A. Black painted bodies only B. All bodies C. Polished bodies only D. A black body...

10. Radiant energy received by a body is proportional to (where, d = the distance between the object emitting radiation and that receiving it.) ?

    A. √d B. d C. d2 D. d1.5...