Multiple choice

A blue object seen in red light would appear

  1. Black

  2. White

  3. Blue

  4. Purple

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

Objects appear a certain color because they reflect that color's light wavelengths and absorb others. A blue object reflects blue light and absorbs red and green wavelengths. In red light (which lacks blue wavelengths), no blue light is available to reflect, so the object appears black.