Glass Definition and 658 Threads

Homework Statement How Does A Ship Float on A Glass Of Water other than that he didnt gave me any details or it is really possible for a ship float in a glass of water in concept of density and buoyancy it's just our first week in class and i don't really have any idea PLEASE HELP !

1) Is birefringence different in plastics, tempered glass and calcite crystal? In plastics I see rainbow color bands (when looking through polaroid glasses), in tempered glass a colorless checkerboard pattern (again viewed through polaroid glasses), and in calcite double images. These...

Since my high school days, I learned that glass is a liquid. (Science naive students thought glass is solid, and the smarty pants knew it was actually a liquid:) Yesterday, while I was telling this interesting fact to my daughter, my wife argued that glass is solid. I googled to explain them why...

I have one question about optics because I start interested in it. If an object is placed a distance p from a thin glass lens (index of refraction n), we can see its image on a screen that is placed a distance d from the lens. Do you know any formula which can describe this situacion? I found...

Homework Statement What is the phase velocity of light in glass if n=1.5 at λ=500nm Homework Equations n=c/vp =λ0/λ The Attempt at a Solution 1.5 = (3x10^8) / vp vp = (3x10^8)/1.5 I'm not entirely sure if the equation I have used is the correct one. It does not use the...

Homework Statement Describe the Faraday effect as it might be observed in a glass cell contained within a solenoid Homework Equations The Attempt at a Solution When a glass cell is immersed in a strong magnetic field, the plane of vibration of light waves is rotated. When...

For a simple starter, I'm curious what the transparency of pane glass is. Moreover, we have a domed observatory and one of the two shutters (lower) has a common window pane about 3' on a side. In fact, there are three elements of the shutter area; upper, lower, and a wind screen (below the...

Greetings PFers, I'm designing a demonstration unit for use in grade schools demonstrating the principle of resonance upon wine glasses (shattering them). I intend to put a wine glass into an acrylic chamber of some geometry, hand the student a microphone and see if they can generate the...

I was thinking of doing an experiment that looked at how the power produced by solar cell is affected by the number of glass sheets placed between the solar cell and the glass sheets. However I am not sure what effect will glass have on light if any? can anyone tell me what effect glass has...

This is a real world application that I'm trying to figure out. I need to estimate the spring constant of a standard cover slip (used in microscopy). The coverslip is a thin glass square, dimensions 25mm x 25mm x0.15 mm. I know the Youngs modulus. How should I estimate the "spring constant" of...

I am not able to understand why is glass transparent because the same amount of atoms are still present and even if they are not able to arrange themselves in a proper crystalline structure then to there will some places where their would be less gap and some places where there is more gap for...

Homework Statement With regard to Young’s Experiment, derive a general expression for the shift in the vertical position of the mth maximum as a result of placing a thin parallel sheet of glass of index n and thickness d directly over one of the slits. Identify your assumptions. Homework...

is [(TeO2)70(B2O3)30]1-x(CuO)x a binary oxide glass? What is the definition of second oxide? Is the second oxide for the above glass is CuO??

is there an equation that relates frequency to energy on a larger scale, relating to standing waves... what proves that as energy increases, so does frequency of a wave?

Why do all wine glass have four nodes (4th harmonic)?? Why do wine glass have four nodes... or four anitnodes... (4th harmonic)?

My thinking today at lunch ... You fill up the cylindrical glass with water. You take it to hands and you can see fingerprints through the water. The others parts of glass is like mirror. Why you see only fingerprints and nothing else? Can you see similar phenomenon if you use something...

Okay, so now I've lost all confidence in myself. I've had a lot of issues calculating the reflective coefficient for a glass slab and a thin film solar cell. I know this method isn't perfect, and not as good as experimental data (which, if anyone here can supply, I'd be happy to take it)...

As you fill a wine glass with water, how does the resonant frequency change? Surely it should increase? i did an experiment and it decreased? I am so confused!? Why does this happen?

I know this isn't the first thread on this issue but I'm hoping some of you brainiacs can clear up something for me please. I have been living under the understanding that light doesn't travel through glass but rather the glass itself replicates the emf. I learned this a many years back from...

Homework Statement An engraver uses a magnifying glass (f=9.5 cm) to examine some work. The image he sees is located 25 cm from his eye, which is his near point. A) what is the distance between the work and the magnifying glass? b) what is the angular magnification of the magnifying glass...

I was working on this college project in optics, and I was thinking of ways to preserve light by multiple reflections. The question is, if I manage to coat a transparent glass (or acrylic) rod with a reflective layer (via silvering), will the internal layer of the rod be reflective as well or...

Do glasses work in the same way that a magnifying glass does. They take light and focus it onto a point? If a magnifying glass can burn an ant, do eye glasses burn our eyes to a certain degree? Could it just be that eye glass wearers don't stare at the sun? I hope you guys understand what I...

Hi, I am designing a device which has cameras need to see through a sheet of glass at angle very low, near zero. And at that angle most of light is reflected so it is very hard to see. - The surface of the transparent material must be flat and smooth - The camera must see outside object...

Hi there, I wonder if anyone heard or read anything about glass where one can control its polarization electronically. Or such that you can switch polarization on and off. Tried to google but all it gives references to polarized glass. Maybe I am using wrong term for such thing? Thanks in...

Hello everyone! What materials are used for making optical filter glasses? I bought this: http://www.alibaba.com/product-gs/495852853/Digital_Camera_lens_43mm_950nm_IR.html and took its transmission spectrum. So, it reminds me a transmission spectrum of CdTe. But a-CdTe is more...

I have a glass which will act external water pressure of 10ATM and it is fully housed with the center opening(Consider wrist watch). What is the formula to get the required thickness. Say your diameter of the glass or area of the glass is fixed. And the formula required for different profiles...

Here's a question from my textbook: "Why do you not see a spectrum of colors when light passes through a flat pane of glass?" However I think that a spectrum of colors will be formed when light passes through a flat pane of glass. The colors will all be parallel to one another, unlike a prism...

Hey, I'm sure you are all familiar with the experiment where you take a glass of water , put a some seal on it and then turn it upside down. Due to the (atmospheric pressure) - (the air pressure in the glass) exerting a force on the seal upwards greater than the [mg] of the water, the seal...

Hi, I'm looking to hang a glass cryostat that has a glass bevelled flange at the top. If the cryostat stands vertically, the flange is angled at 45 degrees. Like this (more or less; the silver underscore is just a place holder to get the shape approximately right): \___/ |__| |__|...

I have a very hard time cleaning out the hard water stain and soap scum on the shower door glass. I tried the normal cleaning spray. I tried using Vinegar( acetic acid), Lime juice (citric acid) with no luck at all. Any suggestion on what I can try?

Homework Statement I made a graph in Excel which graphs (1/x^2) vs (1/cos^2 (angle of incidence)). From the graph I am supposed to analyze the slope and intercept of the straight line. I made a trendline which came out to be y=mx + b = (-0.0084)x + 5.54. From this equation I'm supposed to...

I'm not sure how to put it, but recently its been happening, so far around 3 times, i leave a glass or a lightbulb on my desk right between my screen and my speakers RANDOMLY, seriously.. SPONTANEOUSLY they EXPLODE They have NOT been exposed to mechanical stress or even rough...

I'm looking at a glass "recipe" that heats the raw ingredients to melt at 1550C. This seems to present a problem in that the raw ingredients include: Al2O3: melting point = 2072 C MgO: melting point = 2852 C And even SiO2 (the primary ingredient) has a melting point (range) of...

My understanding of glass is that it is transparent because photons do not have enough energy to raise the electrons in the atoms to the next energy level, thus the photon is not absorbed thus it gets through and we see it as light. But if the photon isn't absorbed, thus not leaving it's...

I'm doing some research on Vertical Farming with the end goal of creating a facade in an existing building. I'm trying to make a recommendation on what sort of glass to use on the exterior to provide light to the crops. Does anyone know of any good resources or glass suppliers?

Hello all. Consider the case whereby one brings out a cold drink on a hot day. Why do water droplets form on the surface of the cold glass? I would think that when water molecules in the gaseous state collide with the glass surface, they transfer some energy into the glass. Therefore by the...

Hello! :D I wish to know how is Magnification related to Focal Length or Focal point in terms of magnifying lenses? We are researching how magnifications affect the heat produced by magnifying lenses, unfortunately, I found out that it's mostly the size. does this mean that the magnification...

With the paper it can work, but without paper, I highly doubt it? Give me some 'physics' reason why it should/shouldn't work. http://www.youtube.com/watch?v=3rY0auw5wCo&feature=relmfu P.S. How do I embed video? Youtube tag isn't working.

Hello! I'm sorry if I'm posting this in the wrong section. I didn't know where else to put this. So here's the problem: Sometimes when I put a glass of water after drinking from it on my table (which also has a glass surface), the glass slides a little bit on its own. Sometimes it happens...

Apparently when a "snifter" glass is placed on it's side and filled up to the tip, this volume is the optimum amount that should be poured to make a shot. Hence i have put a glass on an axis and modeled an equation for the top half of the glass... f(x)=...

Hello. I just got a PMT the glass bulb of which has been broken. Even if performances are not the best, do you think I can use it as an Electron Multiplier (with all convenient electronics) ?

Please someone tell me why sun glasses have no power,though they are curved...

a wonderful lens--a glass of water(high school physics) Homework Statement http://i615.photobucket.com/albums/tt234/chandaiman199111/untitled.jpg Homework Equations The Attempt at a Solution Well,I have already thought for 5 hours,but I couldn't get what it means. My senior form...

The left end of a long glass rod 6.00cm in diameter has a convex hemispherical surface 3.00cm in radius. The refractive index of the glass is 1.60. Distances are measured from the vertex of the hemispherical surface. A.)Determine the position of the image if an object is placed in air on the...

I am building an enclosure for my laser that emits at 1550nm. I need to integrate a window for the laser light to pass through. Anybody have any recommendations on what kind of glass would work best so that the optical losses are kept at a minimum? Ideally, it would be commercially available...

Optics-Lenses-- 1cm thick glass slide is perpendicularly set I don't know how to do the question below. It doesn't say whether the whole system in in the air or in a more refractive "environment" (i.e. submerged in oil). It too doesn't say the exact position where the lens is set, and I think...

Consider a floating ice cube in a glass of water. I know that the weight of the ice cube is equal to the weight of the water displaced. This would mean that if the ice cube melted, the volume of water melted would be less than the volume of the ice cube, because ice has a lower density than...

Is anyone here familiar with the speed of a temperature wave through Si02 or other electrical insulators? Thanks, S.L.

Homework Statement So I have been set a task to design an experiment revolving around a singing wine glass. This is to rub a finger along the rim of the wine glass to produce a tone. At the moment I am considering to do 2 variables, the volume of liquid within the wine glass and the density of...

Light gets dispersed into different colors in a window glass, just like in a glass prism, but the different colors exit the glass at the same angle. We can't see this phenomenon in a glass window because the distance between the different color lightrays is too small for our eyes to detect, or...