Multiple choice

If a body is slowly heated, first it will become

  1. red

  2. green

  3. yellow

  4. white
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

As a body is heated, it emits thermal radiation. According to Wien's displacement law, as temperature increases, the peak wavelength decreases; red has the longest wavelength in the visible spectrum and is therefore the first color seen.

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