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Jan16-12 Greg Bernhardt
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Apr22-11 05:27 AM
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The aim of this thread is to highlight recent (as in within the past 3 months) noteworthy physics papers that have...
May6-14 04:32 AM
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Suppose you have an object sliding along a frictionless floor, but it's approaching a line where the floor changes...
Jun10-14 05:35 AM
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Hello, I have a basic question about superconductive transition-edge sensors (TES) when used in the x-ray gamma...
Dec12-06 05:00 AM
Igor Khavkine
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Let's say you have a metal rod in space that is 2 light seconds long. If you push one end of the rod, would they...
Jul10-05 08:57 PM
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I have a physics problem that is asking about translational acceleration... it says this: "What is the magnitude of...
Nov5-13 02:48 PM
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I had a thought-experiment I was pondering the other day. If you could somehow isolate a single atom inside a vacuum...
Oct31-11 10:33 AM
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I am trying to develop a mechanism for automatically scanning documents which involves picking up pages or sheets of...
Aug2-07 07:31 PM
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Why is translucent spot produced when food containing lipid is rubbed against a paper? Is it related to adsorption?
Aug28-06 02:06 AM
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Beer´s law does not apply if there is any scattering. In a pure absorber, if 1 layer absorbs 50 % of incident light...
Oct19-12 09:57 AM
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Does any one know how ordinary window glass behaves at different wavelengths? It obviously passes the optical band,...
Jun11-06 04:11 PM
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I tried to work out the transmission coefficient and the reflection coefficient for a case similar to the one...
Jun11-03 11:24 PM
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In the case of a complex source impedance ZS and load impedance ZL, maximum power transfer is obtained when ZS = ZL*....
Sep24-11 02:17 PM
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Hello, I am looking at the following calculation for the reflection coefficient of a transmission line using the...
Mar16-12 06:47 AM
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Hello, a beginners question here. Can someone please tell me why transmission lines use two wires instead of just...
Mar7-12 04:40 PM
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If you have a stick and push it from one end, the whole stick moves instantly. You have given the other end of the...
Apr30-09 04:58 PM
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Greetings, When I think of light being "transmitted" through air, I have always used the idea that the light is not...
Apr10-14 12:41 PM
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Am getting actually puzzled about some facts from telecommunication. When signal are transmitted from two mobile...
Sep5-10 08:56 PM
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In order for us to see something, the light photon needs to be reflected, not absorbed or transmitted? Then is it that...
Nov21-10 05:29 PM
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Not sure if this is in the right section, but I'm not sure where else it would fit. I'm currently researching a...
Jul19-13 11:25 PM
Simon Bridge
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Hi The colour of a solution is the wavelength of the light transmitted through it which is white light minus the...
Jun10-10 03:48 PM
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Hi everybody. I have always wondered something and have not been able to get an answer. Let us suppose we have a...
Aug28-12 10:12 AM
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Hi, A colleague of mine at work has this idea of using a focusing lens to focus the visible light into a optical...
Nov5-12 01:22 PM
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Has anyone thought of a mechanism enhancing the disintigration rates of α-decay?
Apr4-03 04:48 PM
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FYI The Roy Process Patent application, apparatus & theory, which contains completed calculations for transmuting...
Oct22-03 04:10 PM
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I am trying to understand the relation between transparency and refraction index. Searched this forum so found and...
Jul12-09 01:42 PM
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I was looking at this photo and it got me wondering. There's a person in the photo, who is apparently not moving so...
Oct27-10 10:13 AM
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Hi, new here. This came up briefly elsewhere and we didn't have the cerebral fire power to get very far with it. ...
Aug14-11 09:49 PM
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What causes water and other similar transparent things to become transparent? Visible light can pass through...
Oct12-09 03:34 PM
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Suppose I have 2 lasers. 1 emits light of exactly 500 THz and the second emits light of a frequency exactly 1 hertz...
Jul7-13 08:37 AM
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If I am using radar to determine the distance of an object from my transmission source by reflecting my radio waves...
Feb2-14 07:58 PM
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There is a HUGE debate going on over at another forum i frequent, several people are claiming that their turbos become...
Nov16-05 06:37 AM
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Stolen shamelessly - and then subjected to the indignities of paraphrasing - I'm taknig a thread from Whitestar and...
Aug12-05 06:28 PM
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Dear all, In modern literature (e.g. metric-affine f(R) theories of gravity), why is the requirement for...
Dec31-08 05:00 AM
Kurt Reichling
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let me make it clear this is NOT A HOMEWORK.i am just having a doubt. if there is a rope passing through two parallel...
Feb14-14 03:58 PM
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If a TEM00 output laser source (regarding both cases of single frequency vs multifrequency) is used as input into a...
Jul15-11 12:38 PM
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I roughly understand that when we hit a metal rod right into the end will excite longitudinal vibration in the metal...
Jan16-10 09:18 AM
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I heard that transverse wave can not travel trough gas and liquid then how can light travel through all the way to...
May12-09 04:45 AM
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A string with a density/length of rho and tension T has an elastic spring with stiffness k at x=0. There is a step...
Feb3-13 04:12 PM
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Ok, so the wavelength is the length between two crests. Is it also the length of a complete wave? (sorry if I sound...
Apr8-12 01:16 PM
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Hi all, i want to ask a simple question which is not so for me. Actually while studying transverse waves, a line is...
Oct20-08 04:29 PM
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Hey my friends please solve my problem Both longitudinal and transverse waves can propagate through a solid. A wave...
May31-09 09:19 AM
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