Homework Answers
Refraction is the phenomenon of the change of the direction of the path of light when light passes from one medium to another medium where both mediums have different refractive indexes. This change in direction occurs because of the change in speed of light when it travels from one medium to another, and which in turn decreases it's wavelength.
Therefore during refraction, speed, direction and wavelength of the light changes.
Also, we know that frequency only depends upon the source of the light, and during refraction the source of the light remains the same (refraction occurs only at the boundaries of the media which doesn't affect the source), therefore FREQUENCY DOES NOT CHANGE during refraction.
Option (d) is correct.
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