83) 40% of incident radiant energy on the surface of a thermally transparent body is reflected back. If the transmissivity of the body be 0.15, then the emissivity of surface is
Answer is:
0.45
Related Heat transfer MCQ with Answers
Answer is:
all of the above
Explanation:
The term radiation is applied to the kinds of processes which transmit energy by means of electromagnetic waves. The amount of radiation mainly depends upon the nature of body, temperature of the body and type of surface of the body.
when the radiations are falling on a body, three things happen, i.e. a part of the radiations are absorbed by the body, a part of the radiations are reflected and the remaining radiations are transmitted through the body.
Answer is:
all of the above
Explanation:
The emissive power of a body depends upon its
* temperature
* physical nature
* wave length
Answer is:
radiation
Answer is: