A ray of light is incident on the mid-point of a glass prism surface at an angle of 25.0° with the normal.For the glass,n = 1.55,and the prism apex angle is 40.0°.What is the angle of refraction as the ray enters the air on the far side of the prism? The surfaces involved are those of the apex angle.

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Quizplus · Accepted Answer

The correct answer is A.The angle of refraction as the ray enters the air on the far side of the prism is 39.4°. This can be calculated using Snell's law, which 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. In this case, the first medium is glass and the second medium is air. The speed of light in glass is slower than the speed of light in air, so the angle of refraction will be greater than the angle of incidence.

A Ray of Light Is Incident on the Mid-Point of a Glass