Question

Read the following statements carefully
A) Black body radiation is white
B) Emissivity of a body is equal to its absorptive power
Mark the correct option
A. Statement A is correct
B. Statement B is correct
C. Both are correct
D. Both are wrong

Answer 1

Hint: All objects emit electromagnetic temperature-based radiation. Cooler objects emit very low frequency waves (such as radio and microwaves) and hot objects send visible or high frequency radiation and even ultraviolet light.
Temperature variations due to energies which are related in with the action of the surface-forming molecules. There was a mistake. The molecules travel rapidly as the substance reaches a higher temperature, so that normally they are more energy efficient. However, this is just rays of the black body.

Complete step by step answer:
Radiation of the black body is a concept used to explain the relation between the temperature of an object and the wavelength of electromagnetic radiation. A black body is a flawless entity that absorbs all the electromagnetic radiation with which it comes into contact. It then emits thermal radiation at its temperature in a continuous spectrum. A black body receives all the energy from the dropping waves. It releases radiations of all wavelengths when heated to the correct temperature. The mixture of both wavelengths of radiation produces white light. The black bodies therefore have white radiation.
The emissivity depends on the surface temperature, wavelength and angle. Surface emissivity information is critical for both accurate measurement of non-contact temperature and for measurements of the heat transfer. Thermometers for radiation detect thermal radiation from a surface
Emissivity is similar to absorptive power as the subjective body emits and consumes thermal radiation into thermodynamic harmony. Emitting power and absorptiveness can in some cases be specified to rely on angle.
Hence correct option is C

Note: A black body absorbs all light wavelengths hypothetically and emits all of them concurrently.
Blackbodies are temperature radiation sources used for radiation thermometer calibration. They should be near one to estimate their efficient emissive value to an ideal Planckian radiator. Its efficient emissivity is dependent on its cavity geometry and the material used.