Glass Definition and 658 Threads

I've been thinking about this question for a little while now and figured maybe a good answer here would help to resolve it. Can glass ever break diamond? Some people I know say it's impossible and yet I am left thinking that it is just a matter of how much power is generated by the impact of...

Hey all, I went to my 10 year HS reunion party last night, and took about 125 photos using my Sony Alpha 350DSLR, a kit lens, and a Promaster hot-shoe flash. The camera was set to manual exposure of 1/10th sec to allow the ambient light to fill in the background, while the flash was left on...

Is it possible to make one of these at home using an everyday glass bottle? If so could anyone tell me how? Thanks

Homework Statement A narrow beam of parallel rays enters a solid glass sphere in a radial direction. At what point outside the sphere are these rays brought to a focus? The radius of the sphere is 4.00cm and its index of refraction is 1.80 Homework Equations na/s+nb/s'=(nb-na)/R The...

Hello all, doing some reasoning and subsequent Gadenkin experiments, followed by a Non-scientific experiment results in some interesting changes in magnetic fields using glass lenses. Here it is, and please help me to explain this phenomenon, as I can find no mention of it anywhere. Two bar...

What causes water and other similar transparent things to become transparent? Visible light can pass through transparent solid object like glass but can't pass through many opaque objects. What is the reason? Again when liquid water turns into ice it loses its transparency. I'll be very...

When it comes to washing glasses, there is always a little residue left over. Presume for a 100mL glass about 0.50mL is left behind when you pour out the contents. Which will do a better job of rinsing out the glass after the first pour? Rinsing 1 time with 1.000L of water (in a large out...

Hi, I'm doing an investigation into the absorbance of UV light by glass of varying thickness (constant density and standard type of glass) for an assigment. However, we're not actually supposed to carry out the investigation due to time constraints, so we're meant to make up the numbers...

hello my question is why glass is transparent why the photon are traveling in it without being absorb use equation & explanation , please this Q? for high level Physicist not for anyone so pleas if you can't use proper equations DONT REPLY and why its path are so specific and strait ?

Homework Statement A beam of light is split into two coherent beams of intensity I which are in phase. The two beams are sent through different paths and superimposed at the same spot on a screen. A path difference is to be achieved by inserting a glass window of refractive index of 1.7 in the...

If slaughterhouses had glass walls, everyone would be a vegetarian. -Paul McCartney would you become one?

I am a little confused by movement. It is difficult to explain, but here goes. Say I have a needle which is almost touching a pane of glass, so close if fact that the smallest movement toward the pane would result in the needle touching it. My confusion is, if the needle has to move to touch the...

Two glass bulbs of equal volume are joined by a narrow tube and are filled with gas at s.t.p. (standard temperature and pressure where \theta = {0^ \circ }{\rm{C}} and p = 1.01 \times {10^5} Pa). When one bulb is kept in melting ice and the other is placed in hot bath, the new pressure is 1.166...

Homework Statement If a glass rod of diameter 1cm is loaded with a 1kN tensile load and has a young's modulus of 70 GPa, what is the tensile strain? Homework Equations The Attempt at a Solution Im sure if somebody could tell me the formula for this i could work it out easily

Hi all, can a laser light be magnified by means of a magnifying glass?

Hello, Having a spot of bother here trying to understand the glass formation in metallic glasses. Could anyone please explain or point me to a source that explains in details structure and kinetics in glass formation? Thanks

Homework Statement The near point of a naked eye is 33 cm. When an object is placed at the near point and viewed by the naked eye, it has an angular size of 0.060 rad. A magnifying glass has a focal length of 16 cm, and is held next to the eye. The enlarged image that is seen is located 51...

Hi, this is not a homework question. Been out of school for way to long and can't remember my physics. I am developing something and I need an equation. What is the angle at which liquid will pour out of a glass? The input I think would only be the % full the glass is. I do not think the...

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...

Hi. Do anybody here know how much and how quick a 50-100mm thick tempered glass plate of size 500mm * 500mm fully heated up within its bulk mass to a temperature of 60 degrees celcius looses it heat energy/temperature over time when surrounded by standing ambient air (20 degrees celcius)...

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...

Hi all, I am studying ZnO and Al-doped ZnO (AZO) for transparent conductive thin film applications. I synthesized ZnO and AZO nanoparticles (NPs) by wet chemical method, then fabricated the thin film on glass substrate by spin-coating technique, and finally, annealed at high temperature...

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

I want to ask how Schott and other glass makers develop their glasses for calibrated light transmittance ? How everything goes ? Is it a quantum physics science or a basic experimentation ? For example , why Leica worked alone to develop its own glass formulas ? For to make a reason to...

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?