Multiple choice

Which of the following is NOT one of the colors that humans combine to see all other colors?

  1. red

  2. yellow

  3. green

  4. blue
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The human eye uses three types of cone cells to perceive color, which are sensitive to red, green, and blue light. Yellow is a secondary color perceived by the brain when red and green cones are stimulated simultaneously.

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