Multiple choice general knowledge

Infra-red rays were first detected by

  1. Herschel

  2. Rayleigh

  3. Huygens

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

William Herschel discovered infrared radiation in 1800 by using a prism to split sunlight and a thermometer to detect temperature changes beyond the red spectrum. Rayleigh studied light scattering, Huygens proposed wave theory, and Maxwell formulated electromagnetic theory.

Keep practicing — related questions