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When light exits a prism, what is the result of its interaction with the prism surfaces?
Light is refracted.
Light passes through without any change.
Light is only reflected.
Light is only absorbed.
Light is refracted.
When light passes through a glass prism, it undergoes refraction, which is the bending of light as it travels from one medium (air) into another (glass) due to a change in the speed of light. This process occurs at both the entry and exit surfaces of the prism, causing the light to deviate from its original path.
When light passes through a glass prism, it undergoes refraction, which is the bending of light as it travels from one medium (air) into another (glass) due to a change in the speed of light. This process occurs at both the entry and exit surfaces of the prism, causing the light to deviate from its original path.
Think of a car driving from a paved road onto a patch of soft sand at an angle; the wheels hitting the sand first slow down sooner, causing the car to turn or pivot toward the sand, just as light bends when hitting a denser medium.
n1тАЛsin╬╕1тАЛ=n2тАЛsin╬╕2тАЛ тАФ Snell's Law governing the refraction angle
╬┤=i+eтИТA тАФ Deviation formula for a prism where i is incidence, e is emergence, and A is prism angle
Refraction is governed by 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 constant for a given pair of media (n1тАЛsin╬╕1тАЛ=n2тАЛsin╬╕2тАЛ). As light enters the denser glass prism, it slows down and bends towards the normal; upon exiting into the rarer air, it speeds up and bends away from the normal. Because the surfaces of a prism are inclined to each other, the light emerges at an angle to the incident ray, a phenomenon known as angular deviation.
Refraction occurs at both the air-glass and glass-air boundaries.
The change in speed of light in the denser medium (glass) is the primary cause of refraction.
The prism disperses white light into its constituent colors because each wavelength travels at a slightly different speed (dispersion).
Allows for the study of the refractive index of materials.
Used in optical instruments like spectrometers and periscopes.
Chromatic aberration (splitting of white light) can be a limitation in precise imaging systems.
Spectroscopy to analyze chemical composition by splitting light.
Optical prisms in binoculars to invert images and shorten the body length.
Refractive index of glass is typically around 1.5.
Option B is incorrect because light changes speed and direction. Option C is incorrect as reflection is a secondary effect. Option D is incorrect because glass transmits most light.
A is correct тАФ Light is refracted.
Remember that light always bends towards the normal when moving from a rarer to a denser medium, and away from the normal when moving from a denser to a rarer medium.
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