Define atmospheric refraction. Why star twinkle at night.
Answers
Answer:
The refraction of light caused by the earth's atmosphere (having air layers of varying optical densities) is called atmospheric refraction. If we look at objects through the hot air over a fire, the objects appear to be moving slightly. The air just above the fire becomes hotter (than the air further up).
Stars twinkle because … they're so far away from Earth that, even through large telescopes, they appear only as pinpoints. ... As a star's light pierces our atmosphere, each single stream of starlight is refracted – caused to change direction, slightly – by the various temperature and density layers in Earth's atmosphere.
mark me as brainliest....
Atmospheric refraction is the deviation of light or other electromagnetic wave from a straight line as it passes through the atmosphere due to the variation in air density as a function of height. .......... Astronomical or celestial refraction causes astronomical objects to appear higher above the horizon.
Hope the answer is useful!!!!!!!
And please follow me friends