A.0 and 0.1
B.?1 and +1
C.?0.5 and + 0.5
D.0 and 1
E.0 and + 0.5
Related Mcqs:
- Reactions in which simple substances are combined to form complex substances are called_____________??
- The emissivity of a body will be equal to absorptivity when
- In case of white body, absorptivity is
- Emissivity and absorptivity of a surface are equal for radiation
- The statement that the emissivity and absorptivity of a surface is surrounded by its own temperature are the same for both monochromatic and total radiation, is known as
- When a body is in thermal equilibrium with its surroundings, the absorptivity and the emissivity of the body are same. This Law is known as
- If the absorptivity plus reflectivity of a body equals 1, then the body is known as
- Suppose that we have an ideal piece of glass with ? = 0. If ? = 0.09 where ? = transmissivity ? = reflectivity and ? = absorptivity
- The rate of radiant energy, which is emitted by a surface at any temperature and in small wavelength is found from the known rate of energy, which under the same condition would be emitted from a black surface by multiplying with the absorptivity. Above enunciation is known as
- Suppose that the transmissivity is zero for a very thick piece of material. If the material is perfectly white where ? = absorptivity and ? = reflectivity
