Question

why do stars appear twinkling ?​

Answer 1

• The twinkling of a star is thanks to the region refraction of light.
• The light, on coming into the earth's atmosphere, undergoes refraction unendingly before it reaches the world.
• The region refraction happens in a very medium of the step-by-step ever-changing index of refraction.
• The Twinkling of stars known as “scintillation” by astronomers is caused by moving air currents within the atmosphere.
• The beam of sunshine from a star passes through several regions of moving air whereas on its thanks to the Associate in Nursing observer's eye or telescope.
• Each region distorts the sunshine slightly for a fraction of a second.

Answer 2

From the given question the correct answer is:

stars appear twinkling because

The twinkling of a star is thanks to the region refraction of light.  The light, on coming into the earth's atmosphere, undergoes refraction unendingly before it reaches the world. The region refraction happens in a very medium of the step-by-step ever-changing index of refraction. The Twinkling of stars known as “scintillation” by astronomers is caused by moving air currents within the atmosphere. The beam of sunshine from a star passes through several regions of moving air whereas on its thanks to the Associate in Nursing observer's eye or telescope. Each region distorts the sunshine slightly for a fraction of a second.