Question

What is rainbow? Write two condition necessary in the formation of rainbow.

Answer 1

rainbow is an arch if seven different colours visible in the sky which us produced to the dispersion if white sunlight by the air molecules present in the atmosphere

the two conditions necessary for the formation if rainbow are as follows
sun should be at the back of the observer
presence of water droplets in the atmosphere.

Answer 2

Rainbow is a natural phenomena caused by dispersion of sunlight by tiny water droplets acting as prisms in the atmosphere.
Conditions:
1 presence of water droplets in the atmosphere
2 sun must be at the back of the observers

Hope it helps...
Please mark as the brainliest