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Refractive index and the speed of light

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Problem

The refractive index of the vitreous fluid in our eyes with respect to the lens of the eye, n, start subscript, start text, V, L, end text, end subscript, equals, 0, point, 93. The speed of light inside the lens, v, start subscript, start text, L, end text, end subscript, equals, 2, point, 14, times, 10, start superscript, 8, end superscript, space, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction.
What is the speed of light in the vitreous fluid inside our eyeballs, v, start subscript, start text, V, end text, end subscript?
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