- #1
csirvi
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The size of light beam is same or different before and after refraction from a medium. If same then why we can not prove from mathematical expression. If not same why?
Size of a light beam before and after Refraction
- Thread starter csirvi
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- Beam Light Refraction
In summary, the conversation discusses the size of a light beam before and after refraction from a medium. The question of whether the size remains the same or changes is raised, and the possibility of proving it through mathematical expression is also mentioned. Additionally, the topic of the angle of deviation and the width of the beam after refraction is brought up, with a request for a diagram or picture to further understand the situation.
- #2
berkeman
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Doesn't look the same size to me...csirvi said:
https://cdn3.vectorstock.com/i/1000...rism-ray-rainbow-spectrum-vector-22696987.jpg
- #3
csirvi
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Its helpful. . One more question is that if we take single color then the angle of deviation is same but also width of beam after refraction changes mathematically how that is physically possible ?
- #4
berkeman
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Can you post a picture or diagram of the situation you are asking about? Thanks. 
- #5
csirvi
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- #6
Nugatory
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Does it? The width of the beam is the distance along a perpendicular to the direction of travel. Look carefully at the angles that you're taking teh cosine of... are these what you want?csirvi said:
- #7
csirvi
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See width represent soze of beam yes that perpendicular to the Direction of travel.Nugatory said:
My question is when the deviation angle same why the width is variable
- #8
csirvi
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Posted the image.berkeman said:Can you post a picture or diagram of the situation you are asking about? Thanks.
- #9
csirvi
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berkeman said:Can you post a picture or diagram of the situation you are asking about? Thanks.
1. What is refraction?
Refraction is the change in direction of a light beam as it passes from one medium to another, such as from air to water.
2. How does refraction affect the size of a light beam?
Refraction can cause the size of a light beam to change, as the speed of light changes when passing through different mediums, causing the light to bend.
3. Does the size of a light beam change before or after refraction?
The size of a light beam changes after refraction, as the bending of the light causes the beam to spread out or converge, depending on the angle of incidence and the refractive index of the medium.
4. What factors affect the size of a light beam after refraction?
The angle of incidence, the refractive index of the medium, and the wavelength of the light can all affect the size of a light beam after refraction.
5. How can the size of a light beam be measured before and after refraction?
The size of a light beam can be measured using tools such as a ruler or caliper before and after refraction, or it can be observed using a lens or other optical instruments.