Atmospheric Refraction

Explain why stars twinkle at night.

In primary rainbow, violet is on the outside of the rainbow, whereas red is on the inside.

Explain what is primary rainbow.

Why Planets do not twinkle?

What is the twinkling of a star?

Define the term atmospheric refraction. Use atmospheric refraction to explain the following natural events.

(a) Twinkling of stars

(b) Advanced sunrise and delayed sunset

What is atmospheric refraction? Explain twinkling of stars using this phenomena.

Does kaleidoscope involve total internal reflection?

Why do diamonds sparkle more than glass?

Is Mirage total internal reflection?

hat is the total internal reflection of a rainbow?

What is the principle of refraction?

Explain the secondary rainbow.

In the secondary rainbow, how many times the light gets total internally reflected before refracting and leaving the droplet.

In the formation of a rainbow, total internal reflection occurs at the rear of the raindrop- the water-to-air interface.

Write the seven colours present in the rainbow visible to human eye, from top to bottom?

The formation of primary rainbow is due to

An astronaut in the spaceship sees the sky away from the sun as.

The straight line joining the sun and the observer along which centre of both the primary and secondary rainbow lies is called axis of rainbow.

In the formation of primary rainbow: