ATMOSPHERIC REFRACTION

Two statements are given - one labelled Assertion (A) and the other labelled Reason (R). Read the statements carefully and choose the option that correctly describes statements A and R. Assertion (A): Stars would not twinkle if we viewed them from the moon. Reason (R): Stars appear to twinkle due to atmospheric refraction of starlight.

Assertion : The rainbow is an example of the dispersion of sunlight by the water drops in the atmosphere. Reason : No reflection or refraction of light is involved in the formation of rainbow.

The atmosphere of earth extends upto height H and its refractive index varies with depth y from the top as mu = 1 + (y)/(H) . Calculate the apparent thickness of the atmosphere as seen by an observer in space.

Assertion :- The twinkling of stars is due to the fact that refractive index of the earth's atmosphere fluctuates. Reason :- In cold countries, the phenomenon of looming (i.e ship appears in the sky) takes place, because refractive index of air decreases with height.

Assertion : Just before setting, the sun may appear to be elliptical. This happens due to refraction. Reason : Refraction of light ray through the atmosphere may cause different magnification in mutually perpendicular directions.

Refraction || Refractive Index || Laws OF Refraction

Refraction Of Light|The Refractive Index|Refraction BY Spherical Lenses

Atmosphere|Composition Of The Atmosphere|Weather And Climate|Summary

Refraction In A Medium With Varible Refractive Index