Question

In a primary rainbow what is the order of colours observed from earth?

• A. Violet innermost, Red outermost
• B. Red innermost, Violet outermost
• C. Random
• D. White and dark alternatively

Answer 1

The correct option is A Violet innermost, Red outermost

In a primary rainbow red colour is on outermost arc, violet is in innermost arc. The red rays appear to be coming from a water droplet which subtends ${42}^{\circ }$ to the eyes whereas violet rays appear to be coming from a water droplet which subtends ${40}^{\circ }$ to the eyes.