Glass Definition and 658 Threads

Homework Statement Consider a glass plate of refraction index n and thickness ## \Delta x ## placed between a point monochromatic source S and an observer O, as in picture. (a) Prove that, if absorption from the plate is neglegible, then the effect on the wave received by O is the add of a...

Homework Statement A rectangular windshield is to be assembled by installing a glass plate on a 3 ft by 1 ft frame at 60°C. The glass plate is cut at 68°F in such a way that its length is three times its width. The linear expansivity of glass is 5 x 10-6 /C°. (a) What area of the glass plate at...

Hi, I was reading up on the properties on various materials but never quite found out what I was looking for. My question is this , I found out an explanation why diamond is the best thermal conductor even though its not a metal and why other materials that would be similar to diamond like glass...

Homework Statement Light of wavelength 600 nm passes through two slits separated by 0.20 mm and is observed on a screen 1.0 m behind the slits. The location of the central maximum is marked on the screen and labeled y=0. (I only need help on the last 2 parts, but I will list all of them in...

Homework Statement There is a cyllindrical glass (r=0.05 m) full of water. It is rotating around its vertical geometric axis with 3 turns per second. How many centimetres higher is water at the rim than in the centre of the glass . Water rotates together with the glass. Homework Equations...

I was at the store today and the clerk helping me dropped a jar of eye cream on the ground a few feet away from me. It was quite shattered. I could hear the glass continue to travel outward along the floor (and see the fallout when I looked down), but I'm wondering if the force of the fall/break...

to caracterize for exple metallic nanoparticles with SEM i should deposite them on a substrate i tried a deposition on glass substrate but it doesn't work and i see nothing can anyone help me or suggest an appropriate solution to that best regards

Is there a material that changes from transparent to a pure white, ideally with reflective ability. Smart glass almost does this but falls short on it but being white enough (and not reflective).

In an experiment to trace the path of a ray of light through triangular glass prism. Can the angle of deviation be zero? Why?

When the sheets are very smooth and are pressed together strongly, I guess they could be viewed somewhat as a unit, so the force to pull them apart would be approximately equal to or less than the atmospheric pressure times the area of the sheets, but definitely not more than, is this correct...

What is the physics behind heat transfer between two panes of glass? Commonly windows now are filled with argon (some cost) or krypton (pricey) At a given temperature all gas molecules have the same energy per mode, so heavy ideal gas molecules move more slowly than light ones, so heat...

Homework Statement Soda from a ms=12 oz can at temperature Ts=13 degrees C is poured in its entirety into a glass containing a mass mI=0.16kg amount of ice at temperature TI=-19.5 degrees C. Assume that ice and water have the following specfic heats c1=2090 J/(kg*C) and cs= 4186 J/(kg*C), and...

Dear forum, I'm currently trying to buy some simple glass double-convex lenses with no optical coatings from China with the help of a colleague over there. I'm trying to match a lens that I already have but which is no longer readily available to me here in Brazil. The lens I have is...

When its day we can kind of see our reflection a little bit and also see outside, when its night we can fully see our reflection in the glass window. Can someone explain quantum mechanics behind it because i think iv read an article long time ago on it but can't find it anymore.

Homework Statement This is less of a calculation and more of a observation problem: Our teacher shined a sodium light on top of two stacked pieces of translucent glass. We then had to bend down to get eye level with the stacked glass. When we did this you could see dark ( concentric?) rings...

I have a conceptual doubt. pl help me clarify it: What will happen if angle of incidence on a glass slab is 0? will refraction take place, or reflection, or both?

Hello, I am working on a Project and it has been a while since i did calculations With mechanics. The pool would be made in glassfibre with polyester and will be: L=2000mm W= 1750mm h= 400mm we use the E-module for glass, so we use E= 70 000 N/mm2 I= bh3/12 = 2000mm x 4003 mm /12 = 1,067 x...

Hi Folks, Problem Statement How would one use the conservation of angular momentum to explain the attached picture? The rod is held fixed horizontally..the person holds on to the cork and then let's go...apparently the glass is saved due to this conservation... Relevant Equations Momentum...

I observed that if you pour soda into a glass cup and leave the straw inside, bubbles seem to form on the plastic cup at a much much quicker rate. Why is this? Why do bubbles form on the straw at all? Not sure if this should be in general physics or chemistry

When immersed in a high-frequency sound, the rim of a wine glass oscillates as shown in the picture below. If the sound has equal intensity in all directions from the center of the rim, then where are the nodes of the stationary waves (in the rim)? By symmetry, every point on the rim is the...

So I have a cup of cold water placed on a table, as I hit the table with my palm I'm seeing concentric circles forming and disappearing on the water surface. Why is this happening? Are they waves or something else?

Hello! I am designing a vacuum chamber made of a vertical glass cylinder free of contact from any other structure, except by the top and bottom where aluminum disks seal the device. Temperature is the same inside and outside. I found on several books the following formula for the hoop stress...

Homework Statement Would you see the same thin film interference pattern in a film of soap surrounded by air and a film of soap on glass? Why or why not? Homework Equations None The Attempt at a Solution Yes, you would see the same thin film interference pattern in a film of soap surrounded...

Homework Statement A light ray falls from the air (##n_a=1##) into the center of the upper surface of a long cilindrical glass tube with an index of refraction ##n_t=3/2##. The tube is submerged into water all the way to the upper edge and the waters index of refraction is ##n_w=4/3##. What is...

Homework Statement An observer looks at a small object using a magnifying glass with the focal length of 12cm. Distance from his eye to the magnifying glass is 1cm. The shortest distance at which he sees clearly is 25cm and the largest is when the image of the object is in the distance...

I'd posted more of a real world version of this question, involving greenhouses, a few days ago at... https://www.physicsforums.com/threads/is-greenhouse-interior-much-cooler-if-reflective-inside.875575/ ...but with no responses after 130 reads, I'm reducing it down to a barer and much better...

So in glass, transparent liquids, and plastics is the eV for the electron known to science. The eV levels for electrons in gases are known like in hydrogen, and helium, but are they known for glass, and transparent liquids, and plastics. Or is it just too discernable to get. I am grateful for...

I have the following optical setup, in which the goal is to record the diffraction pattern of a sample on an image detector some distance away. In this particular case, the sample is sitting on a standard microscope glass slide. Now, after recording the diffraction pattern, I numerically...

- liquids, and plastics for light to transmission completely through the material. Is this eV level known in glass, liquid, and transparent plastics, for electrons to transmission light. Physicists say that "In most solid or liquid substances, the electron structure is so complex that...

Homework Statement Two parallel glass plates of index of refraction n are separated by an air film of thickness d. Light of wavelength λ in air, normally incident on the plates, is intensified on reflection when, for some integer m a) 2d=mλ b) 2d=mλ/n c) 2d=mnλ d) 2d=(m+1/2)λ e) 2d=mλ/2...

Hello Gentlemen, I am working In phosphate plant with a lot of chemical fumes produced from the Process area. Due to Iodine and Florine gases, my car glass is damaged (corrosion) and i barley can see while I am going home.:frown: Please help me to find any Chemical Compound that helps to...

Hi, I have been researching about the singing wine glass experiment (EEI). I was wondering where i could find more research papers or information about this equation. I was also wondering what the equation in finding the constant (beta). Thanks,

Homework Statement A harmonic EM-wave is propagating in glass in the +x-direction. The refractive index of the glass ##n = 1.4##. The wave number of the wave ##k = 30 \ rad/m##. The magnetic portion of the wave is parallel to the y-axis and its amplitude ##H_0 = 0.10A/m##. At ##t=0## and ##x =...

Hello, This question is from 1990 Turkey National Physics Olympics. I tried my best to translate it clearly. 1. Homework Statement https://s23.postimg.org/cotn29afv/Hollow+Spherical+Glass.jpg The sphere of radius 2R has an empty sphere inside with radius R. In order for the image of an object...

Hello all, I am in desperate need of some help. I'm writing my last paper for my senior capstone in physics (:smile::smile::smile:) and my experiment is Faraday Rotation. I CANNOT find a reference for the Verdet Constant of SF59 glass at 650nm (found V for many other wavelengths). I have...

Homework Statement Question 1: When analysing AP French's Formula for Frequency of Wine glasses, what is the direct relationship between the Frequency heard (at different levels - fd) and the level of water from the top of the glass (d). I know that as the level of water from the glass...

Homework Statement A glass block of thickness 60 cm and refractive index 4/3 is placed in front of a concave mirror. A light source is then placed on the center of curvature of the concave mirror. Find the position of the final image formed. (Focal length is 30 cm) Homework Equations...

I want to build a telescope and want to know which type of lense is better suit for this. Please anyone help...

In glass, the elements that make it up, like silicon, and sodium. Does the electron eV levels change as these elements become molecules [PLAIN]http://www.chemicalforums.com/Smileys/classic/grin.gif, and become solid glass. To put it another way, if silicon, sodium, and calcium atoms which have...

Anyone knows why plastic eyeglasses have less clarity than glass? What is the molecular properties of plastic eyeglasses and the behavior of light rays as it passes thru them?

Homework Statement My group and i need to do an experiment for school. We decided to investigate the effect of water level in a vine glass (or volume) on the resonance frequency. Basically does the resonance frequency change when you change add water to the glass. I would just like some help...

If someone was to punch a double pane window from inside how far could the glass fly outside.. this window is 5ft off ground and I found glass as far as 15 ft away is this possible with a bare hand?

What about the structure of glass allows light to pass through, lose 10% of its energy then keep on going when all other object seem to absorb light. what makes clear objects structures so special. When the lights goes through the (regular) glass and loses energy is it losing energy in the form...

If the temperature of the wall is homogeneous i.e. the entire wall has the same temperature: T1 being the temperature of the left wall and T2 being the temp of the right wall, how will heat transfer take place? Can convection occur here? If yes then how will the bulk motion be set up? I am...

Homework Statement Two waves travel next to each other for 100cm. Wave A passes through a glass container containing liquid. The thickness of the glass in total is 1cm and the width of the liquid is 10cm. The glass has n = 1.52 and the liquid has n=1.33. Wave B passes through a vacuum and...

Homework Statement Homework Equations ## θ_{brewster} = arctan(\frac{n_2}{n_1}) ## The Attempt at a Solution Hi all I'm having difficulty on this part of a question Now, showing that all light passes through is to say that there be no reflection. This occurs when the angle of incidence...

Five days ago, I filled a glass 2L bottle about halfway with litchis, then filled the bottle with water till the end and sealed it with its cap. I was curious to see how it decomposes in there. This morning, about 1/7th of the water was lying in a puddle around the bottle. I could see gas...

Carbon. So is it known what energy levels for electrons in glass atoms are in eV to move to a higher shell level. Glass does not absorb any light, except UV. but what is the eV for the glass electron to get excited and leave the ground state, and move up to shell level 2, or energy band 2. Also...

electrons in terms of absorption. To move from a lower to a higher energy level, an electron must gain energy. Oppositely, to move from a higher to a lower energy level, an electron must give up energy. In either case, the electron can only gain or release energy in discrete bundles. Now let's...

... compared to a opaque materials electrons. Is it the amount of electrons in the atoms shells ?If you have a four inch cubic block of glass, and carbon, light passes through the glass no problem, but the carbon will absorb some red, yellow, green, and blue light, but if you look at the carbon...