Reflector Definition and 48 Threads

Who can help me to calculated a reflector for a straight light tube with a diameter of 6mm and a length of 300mm given a beam with a width of 100mm at a distance of 500-700mm?

My theory is that the gas inlet end, which is supposed to act as a sound reflector may not be doing a great job because it is plastic and has a hole cut in the centre for the gas inlet port. But by that reasoning, the flames at the end most distant from it (the sound inlet end) should be the...

I have an Orion 130 reflector. Never had a telescope before. The field of view is about a quarter inch through the focuser with the 25 mm eyepiece. Does anybody know what I am doing wrong or if there is something wrong with the telescope itself? I'm at my wit's end. Any help would be...

So the quality of my over-the-air digital TV reception has been getting worse over the past few months. Probably the digital TV antenna that I'm using is getting old and starting to degrade. Last night I resorted to trying different reflector combinations to try to boost the signal for the...

Hello there I'm working on this problem: Solve numerically for the eigenvalue and neutron flux distribution in a slab reactor consisting of two adjacent core regions each of thickness 50 cm, with a 25-cm-thick reflector on each side. The nuclear parameters of the two core regions are (D = 0.65...

Homework Statement...

Homework Statement Find the minimum height of a vertical flat reflector, in which a 1,78 m person can see its full reflection. Homework Equations M = h'/h The Attempt at a Solution I really don't know what to do here, and I feel as if I'm missing some crucial element. The chapter about...

I am currently re-fabricating solar concentrator dishes to allow for automatic tracking of the sun during the day and month. The industry term for these dishes is 'CSP' (Concentrated Solar Power). Task at hand: The CSP parabolic dishes are currently manually adjusted to the position of the sun...

Let's say we have manned space vessel powered by a highly power but radioactive rocket engine, producing a lot of deadly gamma rays. The classical answer to this problem is to use a shadow shield. However, Nuclear Shadow Shields are very heavy. What about the idea of instead of trying to absort...

Lets say I have a coil that is 1cmx1cm in area that gets heat up. I am told that I get 2W/cm^2/sr output. So if I had 100 of them in an array, the total radiant intensity would be (2W/cm^2/sr x 100 x 1 sqcm =) 200W/sr. Now, let's say I add a parabolic reflector around each coil. How would I...

Complete reflector novice here. Just got a reflector (using refractor before). I had no problems doing astrophotography with my refractor however with the reflector I get double images. Why is this so? Is this a collmination problem? It's not the camera because there's double images when I...

Hello everyone. This is my first post.. I have been given the task of building some large RF reflectors that will reflect 35GHz RF energy. Can anyone give me an idea of what material / thickness of material I could use. For an example.. Would a pyramid made from wooden pallets covered in...

Can anyone please provide some web links or tips for making a homemade reflecting telescopes by own?

Hey guys! My dad bought me a reflector telescope (Levenhuk Strike 120 plus) but I am having a hard time figuring out how it works. I managed to assemble the telescope with the help of my dad but we cannot seem to see anything through it. Any suggestions what could possibly be wrong with it? Or...

When the beam of electrons reflect back to the grid due to the repeller voltage in reflector plate ,how the grid decelerates the returning electrons ?? And how they release their energy to the grid ?

I was wondering what type of lens would be best for capturing the light incoming from a parabolic reflector into a container? The Fresnel lens looks like a good candidate, but I am still not quite sure. Does anyone have any insight on this subject? Just for info, the parabolic lens redirects...

For microwave. Is it any insulator? Rubber will work?

Hi i am new to the forum and hopefully i can get some help. I am trying to design a small parabolic light reflector that can be used with an LED array as being the source of light. The diameter of the LED array is 18.75mm. I am trying to obtain equations that would relate the diameter and...

Hi all, We got these rad reflector foils to improve your heating bills in our shop today. Trying to figure out if there any good. As a really quick test to see if they do anything, i stuck one to the kettle and measured the temp difference with a thermal imaging camera. (pics attached)...

Hello every body! Last weak I decided to make a corner reflector antenna for reciving TV signal.Now I need design and construction theory about it with total idea.I also need circuit diagram.Please share with me if anybody knows. sorry for my bad English. Thanks

So l am designing a radiation detector using solid state silicon photo multipliers. On their website they tell me that the SiPM must be coupled to a Cs(Ti) crystal with a combination of specular reflector diffuse reflector film between the scintillator and detector. How does a combination of a...

Hey everybody. If I have a moving plane reflector with incident planar e&m waves, there is a Doppler shift in the reflected e&m wave, correct? So if the reflector is moving in the direction of the wave propagation, then the reflected waves are lower frequency then the incident waves...

Well, I have a Zhumell Z8 Dobsonian. 8 inch reflector. It's kind of heavy, but is easy enough to transport. It didn't cost me much, under 400 I think. I am a big fan of it. I personally wouldn't ever choose portability over viewing quality, as long as I can move the thing. I'd always feel like...

Hi everyone, I'm working a on a project involving acoustic levitation. Right now we're trying to finish up construction of the apparatus. In particular, the reflector plate is proving to be slightly difficult. The transducer we're use has a resonance frequency of about 29.95 kHz. As far I...

What can reflect,block or neutralize magnetism and magnetic field of a magnet?

Hi I need to calculate the radius of curvature of a reflector.I have a sound source (Ultrasonic transducer of 40 mm operating at 50 Khz) in air . I am trying to generate a standing wave using this sound source .As curved reflectors can help to amplify the sound pressure (I actually don't...

Hi I have read several papers and found that for both sound beam /light beam , the sound pressure obtained is higher when a concave /curved reflector is used in place of a flat reflector. Can anyone tell me why? Is it related to soem consideration of energy loss from the wave? If...

Increase reflector output? Greetings, I have been workings on a Solar Tracker. I have some small TV sat dishes that I am planning to cover with Mylar to create the reflector. After viewing some videos on YouTube I noticed that a larger dish produces more heat. Would adding a lens increase...

Hello everybody, I have made a sun reflecting system with sun tracer. I want to reflect sun rays into patio of a building with about 20 meter high. I have installed the system on the roof, opposite the sun and on th edge of the patio. I have used light sensors and have put them opposit to the...

Homework Statement Show, using Fermat's principle, that perfect reflecting surfaces are conic sections. Homework Equations Equations for the ellipse, parabola and hyperbola The Attempt at a Solution Ok, the ellipse seems easy. All rays coming from one focus reflecting to the other...

Hi, we are running experiments with solar power; any inputs on below problem are highly appreciated. TNX Robby Project: We are experimenting how to maximize evaporation, using Solar Power. We have set up parabolic dishes with a fixed focus (Scheffler Reflectors). Each reflector can...

Homework Statement Let P(x1,y1) be a point on the parabola y2 = 4px with focus F(p,0). Prove that the angles "a" and b" are equal, thus showing that a paraboloid will reflect all light from the focus in a parallel beam. Homework Equations Dont know of any The Attempt at a Solution...

what is the best telescope? refractor or reflector? is the principle of reflecting is better or the reflacting?

[SOLVED] Corner Reflector Homework Statement A corner reflector is to be made from a triangular prism with index of refraction n = 1.86, as shown in the diagram below. What is the maximum angle, with respect to the normal to the front surface of the prism, θ, such that total reflection will...

I just got a 500x reflector on Thursday. Gazing is pretty hard though because I live in OC and there's a lot of light pollution so its hard to make out most things in the sky other than the moon. Any tips for a high schooler's stargazing?

Consider a reactor being held sub-critical, Keff < 1, by control rods. The reactor has heavy water reflector and has been operatored for some time prior to the current state (we got Photo Neutrons). Keff is then bought to 1. It seems to me, for Keff = 1 the neutron population should be...

When a reflector is added to the previous setup, as shown in Figure 9 (page 201), a standing wave can be created. We are using a different detector in this case. Measuring the detector output as a function of distance along the goniometer (look it up!), we see that there are maxima and minima in...

Hellooo Friends Tell me what is optic solar reflector. Recommend me online literature

Well i have just recently received a meade 2114 atts reflector. I used it last Night and it seemed a bit complicated. I put it in the home postion and then let the autostar thing search and it either pointed at the ground or in a dark spot in the sky. It may have been the clouds but it seems i...

Here is a shot of the transit of venus as seen from Swansea, South Wales i used a 114mm reflector wiht a 900mm focal length with a Mylar solar filter. A universal t-mount fitter with a 20mm eye piece. mounted on the t mount was a Canon EOS 50E loaded with Fuji Superia XTRA ISO 200 film...

Hi all. I have a very heavy 9" reflector but it is has spherical curve. It was made for a semiconductor projection aligner which was being scrapped and I saved the mirror from going into the trash bin. I saw an article in one of the rags about making a frame on the back of the mirror where...

What material would be best to use when making a cylindrical reflector (antenna) for a 2.4Ghz signal?

Hi! Well can u help me in this problem. it is related to a device called Corner Reflector. " A corner reflector is formed by three mutually perpendicular reflecting surfaces. Show that a ray of light incident upon the corner reflector (striking all three surfaces) is reflected back along a...

Hi! Well can u help me in this problem. it is related to a device called Corner Reflector. " A corner reflector is formed by three mutually perpendicular reflecting surfaces. Show that a ray of light incident upon the corner reflector (striking all three surfaces) is reflected back along a...

Hi! Well can u help me in this problem. it is related to a device called Corner Reflector. " A corner reflector is formed by three mutually perpendicular reflecting surfaces. Show that a ray of light incident upon the corner reflector (striking all three surfaces) is reflected back along a...

Skywatcher 5.1" parabolic reflector for DSO? Hi, I've been scanning the night skies with my trusted 12 X 50 binoculars up until now and want to move onto a reflector for deep-space objects. Budget and portability have pointed me towards the below scope and i wondered whether any other...

I heard about a technique where mercury or some other liquid is spun in a dish until it assumes a parabolic shape. Would this work in space? Could a flat membrane of liquid metal do just as well? It could be liquified by an electric current and start out flat like soapy water in a bubble wand...

I have owned 2 other types of telescopes previously and i am looking to buy a Celestron C-6N reflector. Does anyone have any comments on this scope? (+'s or -'s)