Glass Definition and 635 Threads

What´s glass feature (molecular structure) that allow the visible light bypass it ? :confused: Thanks

hey guys just a quick question Does anyone know the u value of jusy normal glass? Ive looked everywhere and I've got different answers on source says 5.4 and another says something like 1.08, 5.5 seems pretty high but i think id better find out for sure thanks for any reply's:)

Homework Statement When 2 glass plates form an air wedge with a fine wire at one end, why don't we convert the given wavelength in air of light into the wavelength in glass since we have to convert it when it is entering in water?? Thanks Homework Equations The Attempt at a Solution

Homework Statement The attached image shows the temperature as a function of the distante to a glass window. The window dimensions are given ( 60cm, 60cm, 0.5cm) and the thermal conductivity of the air and glass are, respectively, 1W/(m.K) and 0,025W/(m.K). What is the energy transfer to the...

Homework Statement The drawing shows a rectangular block of glass (n = 1.52) surrounded by a liquid with n = 1.79. A ray of light is incident on the glass at point A with a 30.0° angle of incidence. At what angle does the ray leave the glass at point B...

Homework Statement The drawing shows a rectangular block of glass (n = 1.52) surrounded by a liquid with n = 1.60. A ray of light is incident on the glass at point A with a 30.0° angle of incidence. At what angle does the ray leave the glass at point B...

A glass Slab is placed over a page on which the word VIBGYOR is written with each letter in its corresponding colour. Will the image of all letters appear to be in the same level or will each letter be raised by different levels?

Hey guys, Homework Statement I am conducting an investigation in which we will be playing around with the resonance of different wine glasses. I would like to know what characteristics of wine glasses cause the resonate frequency to change. Preferably not a direct answer but more a hint...

hello again folks, this is the last problem that I haven't gotten in this week's homework. see attached image. Homework Statement Two rectangular pieces of glass (see attached image, I painstakingly made it with a very fussy/crash-ey program) are laid on top of one another on a plane surface...

Homework Statement I have plate of glass pressed between a hot plate on top and a insulating surface below. The idea is to be able to predict the temperature of the glass plate and the thermal gradient through the plate as well at any time. I know the hot plate is at 400 deg F, that it is an...

Why does total internal reflection happen in glass?

Homework Statement The figure shows a light ray incident on a glass cylinder where h = R/9. At what angle α will the ray be refracted? (Image Attached) Homework Equations n(sin(theta))= N(sin(THETA)) The Attempt at a Solution I'm not sure how to attack this problem. I've...

Any hints on how to derive the glass viscosity? n=n(0)exp(Q/RT)?

Hie i am doing my final project, and i will be working on an Automatic glass filling system for champagne.This will involve emptying the champagne into 4-5 glasses and having them ready for delivery to the respective tables. I am trying to find out if anyone has an idea of how i can sense the...

I need metallic glass for my hobbies and crafts. I learned that its possible to thermoplastic injection of metallic glass. Is it possible to produce such a lumb of metal and how ? Best regards , Mustafa Umut Sarac Istanbul

Hello, This is my first post to physicsforums. I hope I've picked the right forum for this question, please correct me if not :blushing: To answer my question you'll have to have the book "QED, the strange theory of light and matter" in front of your eyes. I'm now reading Feynman's QED...

1. I can't seem to find a formula to figure out the area of an upright rectangular glass rod. Can someone point me in the right direction? 2. The Attempt at a Solution

Homework Statement What does a piece of glass stick to another piece of glass? We conducted a demo in school where we stuck to pieces of identical see-through glass on top of each other and they stuck together for a second or two. Homework Equations None whatsoever other than it was...

A glass soda bottle is emptied of soda and filled to the very top with water. A cork is carefully fitted into the top of the bottle, leaving no air between the cork and the water. (Intro 1 figure) The top of the bottle has a diameter of D_top = 2.00 cm and the bottom of the bottle has a...

Given: The linear expansion coefficient of glass is 9 × 10−6 (◦C)−1. An automobile windshield has dimensions of 60 cm by 400 cm. What minimum spacing around the wind-shield is needed to prevent the windshield from breaking if the temperature changes by 150◦F? Answer in units of mm. I...

Odd request time! I need a tiny piece of clear glass, 12mm by 11mm and about 2mm thick. Does anyone know where I might be able to get one? I am trying to think of places that use thin glass for other things, but am not having much luck edit- maybe a picture framer's shop...

Hello guys. My name is Luqman, and I am a new member of this forum. Currently studying in Japan on Metallic Glass/Glassy Metal/Metallic Alloy, which is a branch of solid state physics. I have a million-dollar question though concerning metallic glass, which I would really appreciate if...

Hey i ned to make a wine glass in graphmatica i got it all but the top of the glass is sitting on the x-axis still x=2y^2+3.5 {3.5,6} i got that and i just don't know (or forgot) how to move that graph up on the y-axis about 1 units i tried adding 1.5y to the equation to make it...

Hey all, I'm attempting a lab where I want to have water moving in circular motion in a glass. I realized that the water will climb the side of the glass creating a sort of conical shape, if you will. I know that there is a way to calculate the change in height that occurs as the speed of the...

why does light go through glass but not through other forms of matter?

using only a bottle and a rope and a water soure

A material with an index of refraction of 1.44 is used to coat glass. The index of refraction of glass is 1.5. What is the minimum thickness of the coating that will minimize the reflection of light with a wavelength of 4680 A? Answer in units of µm. I know that the thickness for this is t =...

It's been a while since I've been in science class and I was wondering if this was theoretically possible. It's so specific because I'm writing a story using this scenario and now am wondering if it's completely unrealistic... What are your thoughts? Here's the question: Let's say you have a...

If you have a lump of metal would it make a louder noise if it hit glass or metal?

If I look through glass, the photons I see have encountered electrons. Is the photon that went into an electron the same one that comes out?

A pair of slits separated by d = 1.30 mm is illuminated with light of l = 610 nm wavelength and falls on a screen L = 2.00 m away. A piece of glass with index of refraction n = 2.2 is placed at one slit. If the maxima shift is Dx/2, and falls on a minimum, what was the minimum glass thickness...

Hello everyone, I am an undergratude student doing to research and I am making dirty Au films. At certian concentrations of Fe (say >.5%) this Au-Fe is showing charateristics of a sping glass. I am attempting to learn what exactly a spin glass is and what its trends look like (resistance vs...

Consider a ray at the interface air and glass (n = 1.5). We know that incident angle i and refracted angle r are related by sin i = 1.5 sin r Can we some how show the relationship between i and r is r = m i + c (straight line)? If you look at the following data, it follows the Snell's...

Dear PFers, could somebody provide an update on the searches for quark gluon plasma, the color glass condensate interpretation, and/or their conceptual basis ? I have found a few big documents, if somebody knows where to find the latest review it would be most welcome. I would like a preview...

Homework Statement What is the electric force between a glass ball with 3.5 µC of charge and a rubber ball with -5.0 µC of charge when they are separated by 5 cm? Homework Equations Colombs Law: F(electric)=K((q(1)*q(2))/r^2) K=8.99E9 The Attempt at a Solution This seems like a...

Hello! As of this week, I have left graduate school. I just completed my first year as an Astrophysics Ph.D. student, but between financial constraints and general unease within my program, I have decided to go another direction. I have a bachelors in Physics, and I have interned at Kitt...

A glass is located in front of concave mirror as shown in figure. The gap between mirror and glass is neglected. In this conditions, where is the final image of matter? http://i26.tinypic.com/2a6w6es.jpg The answer of above problem is not match with mine. I need help. I draw the beams...

A thin piece of glass with an index of refraction of n2 = 1.50 is placed on top of a medium that has an index of refraction n3 = 2.00. A beam of light traveling in air (n1 = 1.00) shines perpendicularly down on the glass. The beam contains light of only two colors, blue light with a wavelength...

I was wondering if anyone on here could give me a detailed explanation on how light passes through glass. I'm a junior in physics at a university, so it's OK if the explanation is complex.

Glass is transparent to visibile light under normal conditions; however, at extremely high intensities, glass will absorb most of the light incident upon it. This works through a process known as multiphoton absorption. In this process, several photons are absorbed at the same time. If very...

Greetings, Just a quick question. I would like to know what order of magnitude the etch rate will be for a solution with a pH of 14 on silica glass (flat surface at room temp) - are we talking nm/hr? microns/hr? mm/hr? Thanks, Claude.

Homework Statement One end of a long glass rod is ground to a convex hemispherical shape. This glass has an index of refraction of 1.53. When a small leaf is placed 20.3 cm in front of the center of the hemisphere along the optic axis, an image is formed inside the glass 9.08 cm from the...

Which travels more slowly in glass, red light or violet light? Violet...right? Thanks

Hi Guys, I am new to this forum and have a "quick" question. Say you had a laser pointer and you directed the laser through a glass block and then to a LDR why would the light intensity recorded be lower than without the glass block? What is happening to the light when it is in the glass...

Direction of travel in glass...please please HELP! Homework Statement A 0.95-cm-thick layer of water stands on a horizontal slab of glass. A light ray in the air is incident on the water 58° from the normal. What is the ray's direction of travel in the glass? (Give the answer in degrees.)...

I would want to know what an inorganic glass is an about its solidification process or references to where i could find information about it.

What color light is transmitted through a piece of red glass? I thought it would be red?

Hi, I have been conducting a lab experiment using a piece of latex glove to stimulate a tone from a wine glass that is rotating on a turntable. I used the equation \lambda=v/f (using an audio spectrometer setup to find f) to find the wavelength of the emitted tone. We expected the top...

http://littleshop.physics.colostate.edu/onlineexperiments/Pyrex%20and%20Oil.html I want to show the math of what happens when the pyrex glass rod is immersed into wesson oil making the bend in light identical, but I don't know where to start? Suggestions? Or equations you believe I should...

Homework Statement The drawing shows a rectangular block of glass (n = 1.52) surrounded by liquid carbon disulfide (n = 1.63). A ray of light is incident on the glass at point A with a = 36.0° angle of incidence. At what angle of refraction does the ray leave the glass at point B? Please...