Questions tagged [absorption]
A transition by which the energy of at least one photon is completely transferred to a material.
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The Attenuation of Light
I have this question:
Show that the attenuation of light as it travels through the interstellar medium follows an exponential law
My initial thoughts were to demonstrate the absorption of ...
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How to calculate absorbed heat by different painted colours on a steel container?
I'm looking to understand how I can calculate the heat impact in a galvanized steel box with a cooling capacity of $0.25\;\mathrm{kW}$.
For example, what is the heating absorption of a box painted ...
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Regarding the absorption property of a blackbody
Consider a blackbody of surface area $S_b$ and at temperature $T_b$. It is placed inside an evacuated chamber (to neglect all the effects of convection), with walls of chamber at temperature $T_c$ and ...
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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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X-ray absorption edge, accurate theoretical predition possible?
It is well known that in X-ray absorption spectroscopy, the absorption spectrum shows discontinuities at some critical frequencies.
Is it possible to predict locations of these jumps theoretically? I ...
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Times associated with absorption and emission processes
I am currently reading the book "Advances in Atomic Physics: An Overview" by Cohen-Tannoudji and Guéry-Odelin. In pages 29-31 the authors discuss a two-level atom subject to a broadband radiation ...
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The absorption of infrared light for regular materials, like fabric wallets backpacks and clothes
I work as a brand partner for a company that produces a patch which strengthens the production of stemcells in the body.
The patches are activated with the help of the bodys own infrared radiation.
I ...
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Absorption and emission spectrum terminology
Hi everyone recently i was looking for laser crystals and since I am an autodidact i was confused by the terminology and units of the optics domain. And specialy by the absorption and emission ...
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How does silver affect transmission of energy in the visible and infrared part of the spectrum?
A common method to prevent radio frequency and microwave energy from going through windows is to apply a microscopic layer of silver to the surface of the glass, either by attaching a film coated with ...
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Complex part of second-order susceptibility in nonlinear optics
In optics, the absorption of photons by a material can be described by considering the material's susceptibility. For linear absorption (involving a single photon), we think about the imaginary part ...
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How can the inverse of stimulated emission be distinguished from "normal" absorption?
A simple system with two energy states can absorb an incoming photon (of adequate energy) to get excited, and it can relax by either spontaneously emit a photon afterwards or get stimulated by another ...
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Why does a higher temperature increase absorption/optical density?
Suppose we have, for example, a gas of diatomic iodine and we shine ultraviolet laser light on it. Then the absorption of ultraviolet increases with temperature. From what I read, it is caused by &...
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How to picture vibrational overtones of water?
Im trying to understand the colour of water. The absorption occurs because of some of the vibrational overtones of water.
The absorption band at 698 nm (14300 cm−1) is a 3rd overtone (n=4)
The ...
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What is the range of noon sun color temperature, when a light meter reports full expected sunlight (+/- epsilon)?
My question came from trying to find what uncertainty bounds, if any, I can assign to a color temperature sensor, without access to an artifact with a precisely calibrated output spectrum.
This leads ...
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Is there a way to use the optical transfer-matrix method to determine the absorbance of each layer in a multilayer stack?
I've implemented the transfer-matrix method to determine the the transmittance and reflectance of a multilayer stack of thin films.
I know that (ignoring scattering) the absorbance of the entire stack ...
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