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A prism splits a beam of white light into seven colours because different colours have different __________________ .
- a)Speed in prism
- b)phase in prism
- c)Amplitude in prism
- d)None of these
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
A prism splits a beam of white light into seven colours because differ...
The phenomena due to which white light splits Into seven colours on passing through a prism is called dispersion. Upon passing through a medium, each of the colors travels at different speeds and hence has different angles of refraction leading to the splitting of the light.
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A prism splits a beam of white light into seven colours because differ...
**Explanation:**
When white light passes through a prism, it undergoes a phenomenon called dispersion. Dispersion is the splitting of white light into its component colors. This occurs because different colors of light have different speeds when they pass through a medium, such as a prism.
**1. Speed of Light:**
When light enters a medium, such as a prism, it slows down and changes direction. Different colors of light have different wavelengths, which determines their speed in a medium. The speed of light in a medium is given by the equation v = c/n, where v is the speed of light in the medium, c is the speed of light in a vacuum, and n is the refractive index of the medium.
The refractive index of a medium is different for different colors of light. This means that different colors of light will have different speeds when passing through a prism. As a result, the different colors of light are refracted at different angles as they pass through the prism.
**2. Refraction and Angle:**
When light passes from one medium to another medium, it changes direction due to the change in speed. This phenomenon is called refraction. The amount of refraction depends on the angle at which the light enters the new medium and the difference in refractive indices between the two media.
In the case of a prism, the different colors of light are refracted at different angles as they enter and exit the prism. This is because the refractive index of the prism material is different for different colors of light. Thus, the angle of refraction for each color is different, causing the different colors to spread out and form a spectrum.
**Conclusion:**
In summary, a prism splits white light into seven colors because different colors have different speeds when passing through the prism. This results in different angles of refraction for each color, causing the colors to separate and form a spectrum.
When white light passes through a prism, it undergoes a phenomenon called dispersion. Dispersion is the splitting of white light into its component colors. This occurs because different colors of light have different speeds when they pass through a medium, such as a prism.
**1. Speed of Light:**
When light enters a medium, such as a prism, it slows down and changes direction. Different colors of light have different wavelengths, which determines their speed in a medium. The speed of light in a medium is given by the equation v = c/n, where v is the speed of light in the medium, c is the speed of light in a vacuum, and n is the refractive index of the medium.
The refractive index of a medium is different for different colors of light. This means that different colors of light will have different speeds when passing through a prism. As a result, the different colors of light are refracted at different angles as they pass through the prism.
**2. Refraction and Angle:**
When light passes from one medium to another medium, it changes direction due to the change in speed. This phenomenon is called refraction. The amount of refraction depends on the angle at which the light enters the new medium and the difference in refractive indices between the two media.
In the case of a prism, the different colors of light are refracted at different angles as they enter and exit the prism. This is because the refractive index of the prism material is different for different colors of light. Thus, the angle of refraction for each color is different, causing the different colors to spread out and form a spectrum.
**Conclusion:**
In summary, a prism splits white light into seven colors because different colors have different speeds when passing through the prism. This results in different angles of refraction for each color, causing the colors to separate and form a spectrum.
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A prism splits a beam of white light into seven colours because different colours have different __________________ .a)Speed in prismb)phase in prismc)Amplitude in prismd)None of theseCorrect answer is option 'A'. Can you explain this answer?
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