CBSE Class 10 Answered
As refraction takes place in atmospheric layers and both stars and planets are outside the atmosphere so why do stars twinkle and planets do not?
Asked by parmodgulati | 05 Jan, 2014, 05:22: PM
Expert Answer
Planets are closer to earth compared to stars and so they appear bigger. A planet can be considered to be made up of a no. of point sources of light. Due to atmospheric refraction, when some of the point sources look brighter, others appear dimmer. So, on the whole overall brightness of a planet remains the same always. Hence, planets do not appear to twinkle like stars.
Answered by | 05 Jan, 2014, 10:40: PM
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