Home
Class 12
PHYSICS
How are rainbows formed?...

How are rainbows formed?

Text Solution

Verified by Experts

(i) Rainbow is due to dispersion of sunlight through droplets of water during rainy days.
(ii) When sunlight falls on the water drop suspended in air, it splits (or dispersed) into its constituent seven colours. Thus, water drop suspended in air behaves as a glass prism.
(iii) Primary rainbow is formed when light entering the drop undergoes one total internal reflection inside the drop before coming out from the drop.
(iv) The angle of view for violet to red in primary rainbow is `40^@` to `42^@`. A secondary rainbow appears outside of a primary rainbow and develops when light entering a raindrop undergoes two internal reflections. The angle of view for red to violet in a secondary rainbow is, `52^@` to `54^@.`
Promotional Banner

Similar Questions

Explore conceptually related problems

Assertion and Reason. Mark the correct choice as:Assertion:We can see the rainbow in the sky when the rain starts falling after a spell of bright sunlight. Reason: The rainbow is formed due to disprsion of light.

How are glasses formed?

How is acid rain formed ? Explain its effect.

Say TRUE or False.Rainbow is formed by dispersion of which light by water drops.