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Which of the following colours of light is bent through a minimum angle when passing through a glass prism?
Question

Which of the following colours of light is bent through a minimum angle when passing through a glass prism?

A.

Green

B.

Violet

C.

Yellow

D.

Blue

Correct option is C

The correct answer is: (C) Yellow
Explanation:
When light passes through a glass prism, different colors of light bend by different amounts due to the phenomenon of refraction. This is because light of different colors (wavelengths) travels at different speeds in the medium, causing each color to refract (bend) by a different amount.
The yellow light is bent through the minimum angle because it has a wavelength that is relatively intermediate compared to other colors in the visible spectrum.
  • Violet light, with a shorter wavelength, is bent the most.

  • Red light, with the longest wavelength, is bent the least.

  • Yellow light lies near the middle of the visible spectrum and experiences a moderate amount of bending, hence the smallest deviation.

Information Booster:

  • Refraction occurs when light passes from one medium (like air) into another (like glass), and its speed changes, causing the light to bend.

  • Dispersion is the separation of light into its component colors due to the different bending angles for each wavelength.

  • Violet light (shorter wavelength) bends the most because it is refracted more strongly.

  • Red light (longer wavelength) bends the least as it is refracted less.

  • The order of bending from most to least is Violet > Blue > Green > Yellow > Orange > Red.​

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