Refraction of light | Physics Part – 1 for ssc railways , state govt exams
What is refraction ?
Refraction is the bending of a wave when it enters a medium where its speed is different. The refraction of light when it passes from a fast medium to a slow medium bends the light ray toward the normal to the boundary between the two media.
Source : http://hyperphysics.phy-astr.gsu.edu/hbase/geoopt/refr.html
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