Multiple choice general knowledge math & puzzles

What is the colour of the red ball when viewed with blue light?

  1. Green

  2. Yellow

  3. Black

  4. Blue

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

A red ball reflects red light and absorbs other colors. When illuminated by blue light, there is no red light to reflect, and the blue light is absorbed by the red surface. Consequently, no light reaches the eye from the ball, making it appear black.