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Human Eye and Colourful World — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceHuman Eye and Colourful World2 Marks
Question
When a light ray passes obliquely through the atmosphere in an upward direction how does its path generally change?
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Answer

When light travels from one medium to another it changes its direction because of refraction. The direction only changes if the speed of light changes too. Thus when light travels from a dense to a rare medium, it's path will deviate from the normal path.

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