All Questions
94
questions
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Property of total internal reflection question
If I create a medium with gradually decreasing refractive index from once face at index 2.0 and other at 1.01, and show a beam of light upon the optically denser side, will there be any losses upon ...
- 21
0
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2
answers
75
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Is there a way to calculate the angle between the refracted and reflected rays given the refractive index?
Is there a way to calculate the refracted and reflected rays? I know we use Snell's law to calculate the refracted rays, but is there a formula to calculate the angle of the reflected rays, or does it ...
- 187
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29
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Minimum Radius of Curvature an Optical Fiber can be bent
Using the thickness and refractive index of an optical fiber, is it possible to know the maximum radius of curvature it can be bent before there are losses due to refraction?
In my research, I came ...
- 187
0
votes
1
answer
51
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What causes light to scatter in a medium?
My understanding is that all mediums have a complex iindex of refraction where the real component is the "standard" index of refraction, and the imaginary component is the extinction ...
- 203
1
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31
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Fresnel Equations and an Opaque Surface?
I'm trying to make sense of what actually happens to light when it interacts with an opaque surface.
The fresnel equations give us the proportion of light which is reflected off the surface of a ...
- 203
0
votes
1
answer
25
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Plastic cup filled with water shiny surface [duplicate]
When I hold a plastic transparent cup half filled with water and see it from above then its sides (up to which water is filled )appear shiny. Some of my fingertips (which are holding glass ) are wet ...
- 1
1
vote
1
answer
113
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Why is deep open ocean blue?
If we assume the ocean is sufficiently deep so that the blue light transmitted inside the water gets absorbed completely before it reaches the ocean floor and be scattered back towards the surface, ...
2
votes
1
answer
119
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What is the speed of light in case of Critical Angle?
When light travels from an optically denser to a rarer medium, it bends away from the normal and at a specific angle of incidence, the angle of refraction is ${90}^{\circ}$. When the angle of ...
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0
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60
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Schlick's approximation for reflectance when $n_1 = n_2$
another raytracer here.
I'm using Schlick's approximation to the Fresnel equations, which is said to be reasonably faithful.
I'm a little puzzled about the situation where the incident ray is just ...
- 101
10
votes
2
answers
2k
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Is it possible to witness a rainbow while facing the sun?
We know that a rainbow occurs due to the refraction and reflection of light inside raindrops. We also know that inside spherical raindrops total internal reflection is not possible. So some light is ...
- 123
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17
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Rainbow formation [duplicate]
Please help me with my query regarding rainbow formation.
Many Books gave formation of only red and violet colour whereas middlemost colours are rising doubt.please check the following picture .My ...
2
votes
1
answer
124
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Why rainbow colors are as they are? [duplicate]
There are handful of questions related to rainbow formation here already, but after looking into them, I feel that I must ask yet another one.
I did a little research on the subject, and most of the ...
- 123
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0
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48
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Is it possible to have single-sided refraction?
Is it possible to have light refract in one direction, then reflect off a mirror but come back as a straight line like the picture below?
The context of this problem is in lens optics when a ...
- 1
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0
answers
54
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Can a mote of dust create a rainbow/prism like effect if floating inside the light of a sunbeam and seen from the right angle and/or device?
The device could be a telescope, microscope, camera, or anything that zooms in with great clarity. I'm pretty sure that lots of dust together in one place in a sunbeam can have this effect (please ...
0
votes
1
answer
38
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Is it possible to see real images without a screen?
I have always wondered about this question, so searched it up on the internet and there were contrasting ideas.Some said that it can be seen but the others said it can't.
According to me we are able ...
- 31