Multiple choice

Which of the following statements is wrong?

  1. Rough surfaces are better radiators than smooth surfaces

  2. Highly polished mirror-like surfaces are very good radiators

  3. Black surfaces are better absorbers than white ones

  4. Black surfaces are better radiators than white ones

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Highly polished surfaces are excellent reflectors but very poor radiators (emitters) of heat. This is why the statement claiming they are 'very good radiators' is incorrect.

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