Under what special conditions, light does not travel in a straight line?

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When it passes through , some medium like water , then it travels from rarer medium to denser medium , then it will change its bath and bends towards the normal.So at the surface of two media , light changes its direction

Answers

2014-11-23T14:49:00+05:30


Conditions where light gets refracted and doesn't travel in straight line is when there is change in medium(ex.from air to water)

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2014-11-23T14:52:15+05:30
When it passes through , some medium like water , then it travels from rarer medium to denser medium , then it will change its bath and bends towards the normal.So at the surface of two media , light changes its direction
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