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When light rays from stars enter into earth’s atmosphere, it travels from

  • a)
    denser to rarer medium

  • b)
    rarer medium to vacuum

  • c)
    rarer to denser medium 

  • d)
    denser medium to vacuum

Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
When light rays from stars enter into earth’s atmosphere, it tra...
Light travels from rarer to denser medium when it enters into earth's atmosphere
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When light rays from stars enter into earth’s atmosphere, it tra...
Correct option should be (a) because in this question it is said that light is coming from star to earth's atmosphere.That is from rarer medium(vaccum) to a denser medium(earth's atmosphere).
If it were to asked that light is comin from upper atmosphere to the earth's surface then it would undergo from denser medium to rarer medium.
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