A ray of light, which is traveling in a vacuum, is incident on a glass plate (n = ng). For increasing angles of incidence, the angle of refraction A) increases, approaching the limiting value of sin^-1 (1/n_g) degrees. B) decreases, approaching the limiting value of zero degrees. C) increases, approaching the limiting value of 90°. D) increases, approaching the limiting value of sin^-1 (n_g) degrees.

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Quizplus · Accepted Answer

Snell's law states that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is equal to the ratio of the speed of light in the first medium to the speed of light in the second medium. As the angle of incidence increases, the angle of refraction also increases, approaching the limiting value of sin^-1 (1/n_g) degrees.

A Ray of Light, Which Is Traveling in a Vacuum