Questions tagged [reflection]
This tag is for questions relating to reflection, the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated. A familiar example of reflection comes from water waves; as the waves travel they reflect off objects that are floating in the water, and also reflect off the walls of the container holding the water.
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Trapping light by total internal reflection
Consider the attached image.
Light is passed through a circular prism in the form of a disc (by refraction) in a way so that the the angle made by the refracted ray with the normal is 45 degrees....
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Total flux is bigger than radiation flux, error?
The topic of this question is the collection of radiation from the sun. (renewable energy course) The total radiation flux is $$I_\text{total} = I_\text{direct}+I_\text{diffracted}+I_\text{reflected} ....
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Reflection of electromagnetic waves from dielectric
I have several questions regarding EMW reflection. If it will be helpful, I am thinking about the reflection of powerful EMW and problems like heating associated with it.
Does EMW reflect from ...
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Does the fingernail test for detecting two-way mirrors really work?
I was looking for the working of a two way mirror when I came across this video. The person says that if you place your finger on the mirror and there's no gap between the image and the finger, then ...
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How does a Magic Mirror work?
I recently found out about the Magic Mirror. Both sides of the mirror look the same, and it appears to be dark, if looked at closely, like sunglasses (but lighter in colour) but looks like a normal ...
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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 ...
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How do I calculated the second Reflection (2) of light in glass (which equations and tools)
How do I calculated the second Reflection (2) of light in glass (which equations and tools)
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Complex Refractive Indices, Absorption, and Transparency
A complex refractive index is defined as $n = n_0 + \kappa$ where $n_0$ is the "standard" refractive index, and $\kappa$ is the optical extinction coefficient. The optical extinction ...
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Lenses and missing reflection
I am wondering why reflected rays are not considered with lenses. If a ray strikes a surface, another is reflected off that striking point; however, this is not added when studying lenses, only ...
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Fresnel Equations, Refraction, and Metals
I'm trying to make sense of how the fresnel equations apply to metals. Here are a few of the things I believe I understand:
All reflections of light occur specularly. When an object appears to ...
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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 ...
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Final image formation in these 2 cases:
Can someone please explain simply how we determine how many times we have to consider reflection and refraction to obtain final image.
Example a:
Here they only considered refraction twice to obtain ...
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Energy of evanescent wave in total internal reflection
We know that the reflective coefficient in total internal reflection is 1, which means that all energy is reflected. But we also know that for evanescent wave, Poynting vector in the direction ...
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Keplerian telescope with parabolic mirrors
Is it possible to arrange two off axis parabolic mirrors (OPAs) to transform the emitted rays of a point source into a collimated beam, as in the figure below?
That is, similar to a Keplerian ...
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Perceiving the rainbows
Famous Astrophysicist Dr Neil DeGrasse Tyson, explains that whenever we observe a rainbow it appears exactly semi-circle to us. If another person is observing the same rainbow from a slightly ...
