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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Is there a wavelength shift between sunlight observed from the ISS versus from Earth's surface?
As gasses are not ideal in transmitting sunlight. Are there differences between sunlight observed from beyond the Earth atmosphere and the one observed from the Earth surface? If so, what are they?
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Specular and diffuse reflection at the same time
if we know that tomatoes absorb all the light and reflect the red diffusely, how can we see the reflection of all the light specularly at the shinnig point? there isnt an absorption of other colors at ...
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Image formation of object on itself by a system of a lens and a mirror
Suppose there is a lens and a mirror. An object is placed in front of this system (nearer to the lens). If the final image of object (refraction, reflection and again refraction) is formed on the ...
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Relativity problem about light signals and rockets equipped with mirrors [closed]
I find in a relativity book a problem that states:
"A rocket with its own length $L$ moves away from Earth at a constant velocity $v$. A radar signal emitted from a ground station is reflected ...
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Reflection operator for spin 1/2 particle
How do I construct a matrix rep. of a reflection operator for spin 1/2 particle.
Reflection operator ($\hat R_z$ : reflection about x-y plane i.e, along z-direction) acts in following way:
$U^{\dagger}...
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Mutilple beam reflection question in Fabry-Perot cavity
Just having some trouble with a question about Fabry-Perot intereferometers.
Here's the first part of the question:
Consider a beam of light undergoing multiple reflections in a Fabry-Perot cavity ...
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How about optical fiber without cladding and directly coated?
How about optical fiber without cladding and directly coated?
I have got some answers from here, but how about optical fiber without cladding and directly coated? and the coating material have a ...
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Convergence of rays at focal plane after reflection from concave mirror
My teacher taught us that rays parallel to each other(but not necessarily parallel to the principal axis), after reflection from a concave mirror,get converged at a sharp point somewhere on the focal ...
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Plasma Frequency of Indium Tin Oxide
What does determine the plasma frequency? The formula is:
$$\omega_p² = \frac{4 \pi N e²}{m}$$
and for frequencies above the plasma frequency the material is transparent. So for indium tin oxide (...
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Why do different materials reflect different light?
So, as far as I understand, white light contains photons of all energy levels. These hit a material, say iron. The photons that are below the energy level to move electrons just pass through. The ...
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How mirror can be used to explain the appearance of mirages?
Since mirage, in optics, the deceptive appearance of a distant object or objects caused by the bending of light rays (refraction) in layers of air of varying density. The normal path of light rays ...
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How to calculate the intensity of a light when using the ray model?
Suppose that there is a point light source with power $P$. We are interested in a single light ray visualised in the above picture. The ray travels a distance $r_1$ and encounters a surface. The ray ...
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Under water light reflection of air in a cup vs water in a cup
The last time I was on vacation I was drinking on the swimming pool, and after I was finished with the drinks I started playing with the 2 plastic cups I had, and noticed that the air produces a ...
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Images formed by a pair of plane mirrors
I've been taught that if a point-sized object is placed between two plane mirrors at an angle theta with each other, then the number of images formed is $360^{\circ}/\theta$ or $360^{\circ}/\theta - 1$...
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Huygens' principle and the laws of reflection/refraction
As I understand the Huygens principle, all points on the wavefront are sources of secondary spherical wavelets and the tangent to these wavelets will form new wavefront. This is used to prove the ...
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