Refraction occurs at the interface between two transparent media because:
A. The frequency of the light changes.
B. The speed of light is different in the two media.
C. The direction of the light changes.
D. Some of the light is reflected.
E. None of the above.
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Refraction occurs when light crosses a boundary between two materials of different index of refraction: that is, materials in which light travels at different speeds. The index of refraction indicates the speed of light in a medium, as compared to the speed of light in vacuum.
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Answer:
Refraction is the phenomenon of bending of light when it passes from one medium to the other.
Refraction occurs at the interface between two transparent media because the speed of light is different in the two media. The frequency of light remains the same, while wavelength changes.
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