Multiple choice

Danger signals are red in colour. These can be easily seen from a distance because among all other colours,the red light

  1. is scattered the most by smoke or fog.

  2. is scattered the least by smoke or fog.

  3. is absorbed the most by smoke or fog.

  4. moves fastest in air.

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

Red light has the longest wavelength in the visible spectrum, which means it undergoes the least scattering by particles in the atmosphere, allowing it to travel longer distances.