The index of refraction of light in passing from a vacuum into dense flint glass is 1.66.
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The index of refraction of light in passing from a vacuum into dense flint glass is 1.66. If the angle of incidence is 50°, determine the angle of refraction.
Light sound, and other waves travel at different speeds, depending on the media (air, water, wood, and so on) through which they pass. Suppose that light travels from a point A in one medium, where its speed is v1, to a point B in another medium, where its speed is v2. Refer to the figure, where the angle θ1 is called the angle of incidence and the angle θ2 is the angle of refraction. Snell's Law, which can be proved using calculus, states that
The vl/v2 is called the index of refraction. Some values are given in the table shown to the right.
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