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Physics, 21.04.2020 19:15 vmosley8648

A light ray in air enters and passes through a block of glass. What can be stated with regard to its speed after it emerges from the block? Speed is less than when in glass. Speed is less than before it entered glass. Speed is same as that in glass. Speed is same as that before it entered glass.

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A light ray in air enters and passes through a block of glass. What can be stated with regard to its...

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