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how to calculate the speed of light in glass. V in this equation is the speed of light in a medium having an index n and c represents the speed of light in vacuum. This vacuum speed of light c is what the statements from relativity describeWhenever light is in a vacuum its speed has that exact value no matter who measures it.
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On Solving we get. To find the critical angle of incidence use the equation. Speed of light in glass 1973 108.
The tendency of a ray of light to bend one direction or another is dependent upon whether the light wave speeds up or slows down upon crossing the boundary.
Note that rounding errors may occur so always check the results. See Figure 2 and 200000 kilometers per second in glass refractive index of 15. Your reading introduced you to the concept of index of refraction n defined by n c v where c 299792458 x 10 8 ms. A homogeneous medium has a constant index of refraction throughout the medium and light travels along straight paths in it.
