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Question
Light travels the slowest in which of the following media?
Light travels the slowest in which of the following media?
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Solution
The correct option is B Glass
The speed of light in a medium is affected by the refractive index of the medium which in turn, is a measure of the optical density of the medium. The more optically denser the medium is, the slower light propagates through it. Among the given media, glass is optically the densest, and has a typical refractive index of around 1.5. Both air and vacuum have a refractive index of almost 1, while water has typically 1.33.
The speed of light in a medium is affected by the refractive index of the medium which in turn, is a measure of the optical density of the medium. The more optically denser the medium is, the slower light propagates through it. Among the given media, glass is optically the densest, and has a typical refractive index of around 1.5. Both air and vacuum have a refractive index of almost 1, while water has typically 1.33.
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