80) Depending on the radiating properties, a body will be opaque when
Answer is:
x - 0, a + p = 1where a = absorptivity, p = reflectivity, X = transmissivity.
Related Heat transfer MCQ with Answers
Answer is:
time
Answer is:
absorptive power
Explanation:
The absorptive power of a body is defined as the ratio of the energy absorbed for a given time to the energy incident on it for the same amount of time. It measures the amount of heat absorbed by an object. Since, a black body absorbs all the incident energy, its absorptive power is 1.
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.
