acoustics - What is the maximum possible noise level on Earth and …
Sep 19, 2024 · In particular, it is not damaged by the noise it produces. Supposing that nobody resets the alarm, what is the theoretical decibel limit that it could reach given the properties of the Earth's …
What is the laser linewidth? - Physics Stack Exchange
Jun 1, 2025 · Basically they get the power spectral density (PSD) of the frequency of the laser, and the main idea is that all the noise above a given point (which can be easily calculated) doesn't contribute …
Why is pouring hot water visibly different from pouring cold water?
Oct 10, 2024 · A duplicate of Why does hot water and cold water makes different sounds while filling a bucket from a tap but that ha no answers.
optics - Could a computer unblur the image from an out of focus ...
Aug 2, 2017 · Consider that an image blurred due to simple poor focus is like an electronic signal sent through a "low pass" filter. It is possible to reverse this (to a degree) by running the signal through …
Why can't we see individual air molecules? - Physics Stack Exchange
Nov 6, 2024 · Our cones, or rods depending on the specifics, can be thought of as pixels. the human retina has 5-10 million cones: $10^7$ pixels one cubic meter of air has roughly $10^ {25}$ molecules …
Deterministic and stochastic chaos - Physics Stack Exchange
May 25, 2021 · The fundamental difference between noise and chaos is that noise is stochastic whilst chaos is deterministic. Stochastic means the changes in a system depends on a probability. …
Why don't we hear sound reflecting from buildings, mirrors, etcetera?
Apr 5, 2016 · We can see buildings, doors, cars etc. as light falls on it gets reflected to us. but why doesn't the same thing happen with sound? I mean why don't we hear sound reflecting that much?
noise - What information is contained in the quantum spectral density ...
Dec 28, 2014 · The term "spectral density" is usually applied to describe the properties of the coupling between a simple quantum system and an infinite reservoir. In that case the Fourier transform of …
Why can't we see infrared light? - Physics Stack Exchange
Sep 30, 2015 · While explaining to my nephew about the physics of light, I told him we cannot see infrared color, and he kicked back with a very simple question: why can't we see it? I could not tell …
Photomultiplier tube behavior in a fluorescence detector
Sep 5, 2025 · This allows the user to remove Raman and Rayleigh scattering from reaching the PMT. Now there is a setting where one can use the "zero order" mode for the emission monochromator, …