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Physics 11 Online
OpenStudy (anonymous):

Light incident upon a pane of glass slows down in passing through the glass. Does it emerge at a slower speed or at its initial speed?Explain

OpenStudy (akashdeepdeb):

Let the thing it is passing through be a glass slab. It slows down mainly due to the change in speed, which causes a change in the wavelength and NOT the frequency. |dw:1395591511256:dw|

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