Which of the following statements about radiant heat is/are not correct? I. radiant heat cannot travel through a vacuum II. rough surfaces emit radiant heat...

Which of the following statements about radiant heat is/are not correct?
I. radiant heat cannot travel through a vacuum
II. rough surfaces emit radiant heat more than polished surfaces
III. Dark surfaces absorb radiant heat more than bright surfaces

Answer Details

The statement that is not correct about radiant heat is option I only, which states that radiant heat cannot travel through a vacuum. In reality, radiant heat can travel through a vacuum. Radiant heat is a type of energy that travels in the form of electromagnetic waves, and it can travel through a vacuum because it doesn't require a medium to propagate. Option II is correct because rough surfaces emit more radiant heat than polished surfaces because they have more surface area and can radiate more efficiently. Option III is also correct because dark surfaces absorb more radiant heat than bright surfaces because they absorb more radiation due to their high emissivity.