What is atmospheric refraction? Use this phenomenon to explain the following natural events.; (a) Twinkling of stars (b) Advanced sun-rise and delayed sun-set; Draw diagrams to illustrate your answers.(All India - 2016)
Answers
Answer:
option a or c
Explanation:
i dont know
Atmospheric refraction is the bending(kinda) of light caused by the atmosphere of the Earth.
Earth has a layer of gases surrounding it called the atmosphere. When sunlight(or other lights from space) pass through this layer, it bends. This is called atmospheric refraction.
a)Stars twinkle because they are very far away from the Earth and hence, their light is easily refracted by the atmosphere since it is weak. That effect causes fluctuation in the intensity of the light and the stars seem to twinkle.
b)The light from the sun is refracted by the atmosphere, reaching our eyes before the sun has actually risen up. This phenomena is called Advanced sun rise. Similarly, when setting down, the light from the sun still enters our atmosphere and gets refracted, reaching our eyes even after it has set. This phenomena is called delayed sunset.