Why does light slow down in glass?

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SUMMARY

The speed of light is slower in glass than in a vacuum due to the interaction of light with the atomic structure of the glass material. When light enters glass, it is absorbed and re-emitted by the atoms, which causes a delay in its overall speed. This phenomenon is quantified by the refractive index of glass, typically around 1.5, indicating that light travels at approximately 67% of its speed in a vacuum. Understanding this concept is essential for applications in optics and photonics.

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  • Concept of photon absorption and emission
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nil1996
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Why does light slow down in glass?Can anybody explain why speed of light is slow in glass than in vacuum?
 
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