227) The space between the two walls of a thermos flask is evacuated because vacuum is a __________ conductor of heat.
Answer is:
bad
Related Heat Transfer Refrigeration and Air Conditioning MCQ with Answers
Answer is:
Agree
Answer is:
Correct
Answer is:
Right
Explanation:
A grey body is defined as one whose absorptivity of a surface does not vary with temperature and wavelength of the incident radiation. In other words, if the ratio of emission of a body to that of a black body at a given temperature is constant for all wavelengths, then the body is called a grey body.