causes and effects of refraction
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A coin or stone lying at the bottom of a container filled with water appears to be raised because of refraction of light. ... A line or a spot of ink on a paper always appears to be raised when viewed through the glass slab due to the refraction of light. 5. Twinkling of stars is due to the refraction of light.
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Answer:light refracts whenever it travels at an angle into a substance with a different refractive index.this change of direction is caused by a change in speed.
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