Atmospheric Refraction
Atmospheric Refraction: Overview
This topic covers concepts such as Advanced Sunrise, Twinkling of Stars and Delayed Sunset etc.
Important Questions on Atmospheric Refraction
What is the twinkling of a star?
On the basis of refraction of light, explain the following natural events:
(a) Advanced sunrise and delayed sunset
(b) Mirage
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.
Due to atmospheric refraction of sunlight, the time from sunrise to sunset is lengthened by about:
Which among the following are the phenomena observed on Earth are due to atmospheric refraction of light
Planets are seen as extended sources that are considered to be a collection of point sources of light. The total variation in the amount of light entering our eyes from them does not average out to be zero, thereby planets twinkle.
Why don’t the planets twinkle?
As observed from earth, stars seems to be twinkling, the reason is-
All layers of atmosphere has the same refractive index.
Twinkling of stars is caused by the phenomenon of-
The twinkling of a star is due to _____ of starlight.
