Glass Definition and 635 Threads

Hey guys, I think I know the answer but I wanted to confirm... Is it that a plane glass also separates light (internally) but we can't see it because all the rays get refracted back to its original angle when it comes out On the other hand, because the shape of a prism, light that exits a...

there is A , B and C A- is a small powered boat blade B-is a piece of 1 to 1/2 inch glass C- is the power (i don't know how it will power it yet) ------------------------ So how is it possible to have a motor send electricity though the glass to power the small blade? what would i...

In the following figure, the space b/w the glass lenses is filled with water. We have to find the focal length of the system (radii of curvature, refractive indices given) http://203.196.176.41/VLEBT_RootRepository/Resources/6c32207c-7c5a-4462-b90c-89b0c196bc72.gif Now to calculate the...

1. Homework Statement [/b] Consider a double-paned window consisting of two panes of glass, each with a thickness of 0.500 cm and an area of separated by a layer of air with a thickness of 1.75 cm. The temperature on one side of the window is 0.00 °C; the temperature on the other side is 20.0...

I would like to figure out if I take a circular piece of glass that is about 1/8 inch in diameter and crush it to 1/16 of an inch in diameter will I be able to use less energy to melt the same weight of material?

In my lab we have these glass viewing windows that are affixed to a combustion chamber. We've recently been experimenting with some new fuels that have some pretty nasty products of combustion. As a result, the windows have become "cloudy." At first, I thought it was just a nasty film...

Suppose there is a glass stopper with a hollow in it. If the ambient temperature rises the volume of the hollow(say 1cm3 initially) also rises. To find out the increase in volume, do we have to take into account the expansion of air along with the expansion of glass?

suppose one keeps a glass slab over a paper containing various colored letters, i kno the order of the height according to VIBGYOR, but what would happen if one of the letters is black? Will it be raised the maximum or minimum?

Homework Statement Please see here: http://img198.imageshack.us/i/unledev.jpg/ object placed 8 cm before the slab(6 cm thick,silvered at other end). The final image is formed 10 cm behind the mirror.Find refractive index of slab. 2. The attempt at a solution n is refractive index...

Hello I am a newbie to this site. Please help with my pool fence as three different tradesmen have just shrugged their shoulders! I have attached a photo. As you can see, it is frameless glass. It is safety glass 10mm thick and is held by clamps that work with tension only (no screw...

I was posed this question by a professor, and thought I would share with the online community! He asks, "if one were to use simple glass, how could they use it as a mirror, where 100% of the light is reflected?" The glass is transparent, but his hint was to look at a window! Whats your thoughts?

Please can somebody explain to me how and why light travels through glass into our eyes, as it doesn't in opaque objects?

I'm not sure which category of physics best suits light rays and what not so I just stuck this under general physics, many thanks to anyone who can help me with my problem! I want to project some words onto glass with a projector... What projector do I need? I was assuming something with...

Hi, I'd like to know what makes a http://tinyurl.com/4dp9ocl" better at starting a fires by focusing the sun light. Is it the magnifying power, it's size, it's thickness (etc.) ? Also, is there a formula to calculate it ? Thank you. -Philippe

Do wooden wall or window glass give good protection from penetrating radiation such as gamma rays?

Homework Statement At a marine animal park, Alison is looking through a glass window and watching dolphins swim underwater. If the dolphin is swimming directly toward her at 15 m/s, how fast does the dolphin appear to be moving? Homework Equations v=15 m/s I realize that due to the...

greetings, how does light travel through the glass? advanced thanks

Can anyone tell me why poly(ethelyne glycol) has a higher Tg than polyethylene?

Homework Statement The observer in the figure shown below is positioned so thatthe far edge of the empty glass is just visible. When theglass is filled with water, the center of the bottom of the glassis just visible to the observer. Calculate the height H of theglass if its width W=4 cm...

Hello All, One of my science teachers puts a glass rod in his coffee, but he won't tell us why... I was wondering if there was a physic/chemistry related explanation to this. He said that the effect did not occur before when he didn't put it in. Adding the glass rod ''solved the...

Homework Statement A hollow, spherical glass has an inner radius of R and an outer radius of 1.2R. The density of the glass is d. What fraction of the shell is submerged when it floats in a liquid of density ρ = 1.5d (1.5 times the density of the glass)? (Assume the interior of the shell is a...

Homework Statement Why is glass transparent to visible light but not infrared/UV?Homework Equations The Attempt at a Solution I know that it is opaque to UV and transparent to visible light because the higher photons are absorbed by the glass's electrons therefore letting the visible light pass...

Hi! A classic example in order to demonstrate the Photoelectric Effect, is to charge a metal plate (by electrons) connected to an electroscope and observe how the charge decreases when lightning by UV light. When put a pane of glass in front of the metal plate, we observe that the charge...

When a piece of red glass is heated to high temperature, it glows green. Similarly, when a green glass is heated to high temperature, it glows red. But How does a blue or yellow glass glow when heated? I could not find the answers for this when I browsed.

Question about Total Internal Reflection? My textbook says that for total internal reflection to occur 2 conditions need to be met. Light is traveling more slowly in the first medium than the second medium and no.2 is the angle of incidence must be large enough for no refraction to occur. My...

Question about Total Internal Reflection? My textbook says that for total internal reflection to occur 2 conditions need to be met. Light is traveling more slowly in the first medium than the second medium and no.2 is the angle of incidence must be large enough for no refraction to occur. My...

Hello, I came across something interesting on the internet. I saw an image in which a wine glass was half filled with water and put in the middle of the two different colored backgrounds. In the air portion within the glass, the two backgrounds were visible through the glass, however; in the...

Homework Statement A bubble in a glass of beer releases from rest at the bottom of the glass and rises at acceleration, a, to the surface in t seconds. How much farther does the bubble travel in its last second than in its first second? A) at B)(t-1)a C)(t+1)a D)(1/2)at Homework...

Homework Statement An ordinary drinking glass is filled to the brim with water(268.4mL) at 2.0C and placed on the sunny pool deck to enjoy. If the temp of the H2o rises 32.0C, how much water will spill out of the glass?Assuming no expansion for glass... Homework EquationsB=207*10^-6 for...

Homework Statement A steel rule is calibrated for meauring lengths at 20.00 C. The rule is used to mesure the length of a Vycor glass brick; when both are at 20.00 C the length is 25.00cm. What is the length of both the rule and the brick when at 80.00 C Homework Equations coef of glass...

Homework Statement 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...

Homework Statement In how many ways can 3 balls of different colours be put in 4 glass cylinders of equal width such that any glass cylinder may have either 0,1,2 or 3 balls? The Attempt at a Solution Using the formula for no. of ways for distribution of n distinct things into r...

Hi there! I was wondering: is it possible to break a glass using an electromagnetic wave at its resonant frequency?

I have always thought glass was reflective because all visible light falling upon it was absorbed, and only very little was reflected and able to make contact with our retinas, to little to be noticed, therefore making it transparent. I believe the opposite happens to mirrors, most of the...

Homework Statement This happened in real life, rock breaks through single pane safety glass and travels 9 meters, safety glass is 3 meters high. rock was 1 kg. I need to find the rough KE before the rock hit the glass. The MPa of the glass i am guessing is 50, google has yielded me little on...

A typical mercury thermometer is made up of a thin, cylindrical capillary tube with a diameter of 0.0040 cm, and the spherical bulb with a diameter of 0.25 cm. If we DON'T Neglect the expansion of the glasas, find the change in height of the mercury column for a temperature change of 30 degree...

Homework Statement S solid uniform glass sphere is surrounded by air. The sphere has radius R and refractive index n. As shown in the picture, a light ray traveling in air, parallel to a diameter of the sphere, enters the sphere, reflects off the far side, then exits the sphere traveling in a...

This is a problem that my lecturer gave us in class and it has been bugging me ever since. I have been unsuccesful in finding or calculating a proper solution so I am hoping PF will be able to help... This is the Q: Let H be the height of a conical glass which is filled to a height h. Find...

Hi all, this has been bugging me so maybe you can help me out. In the front window of my house, there is a dent in the glass that looks somewhat similar to this: http://www.flickr.com/photos/guerra/2557095422/" However, there is not hole in the glass. But the shape of the dent is...

What determines of something absorbs light? Is it determined by the orbitals the electrons spin at, and what makes these two things special when other things like wood and metal don't

I am currently building a solar panel. I have sheets of glass that I collected, some is saftey glass and some are tempered (probably the same). I have read that Low Iron Tempered glass has 91% light transmission. How do I test the glass that I have for its light transmission? Thanks

itxx change lykk why water in glass flask first decrease then increase?replyy

So if i have a marble in a glass tube and i rotate the tube around in a circle . and the marble is at a distance r from the center of rotation . is the reason the marble goes towards the outside of the tube because when the glass tube starts to rotate the marble wants to go tangent to the...

Homework Statement the prism is made from glass, and its cross section is an equilateral triangle. the indices of refraction for the red and violet light are 1.662 and 1.698, respectively. the angle of incidence for both the red and violet light is 60 degrees. find the angles of refraction at...

regards, i m doing my MSc in glass ceramic, i ve read in journals saying that when glass are heated above its crystallization temperature, it can be considered to transformed into glass ceramics, and of course if has to undergo XRD or FTIR or FESEM to confirm it, but how can we say that it is...

I need help to understand what is happening when I project a image in a sheet of glass. Imagine this picture, a projector as the light source projecting a image in a sheet of glass: 1: I have high transmission. (the light that pass away the sheet of glass) 2: Low absortion 3: A so so...

Homework Statement A Glass of water is freely sliding down an inclined plane. The water surface has settled down after some initial disturbances. Which of the three cases is possible for the shape of the water surface: 1) It will remain parallel to the incline 2) The water surface will rise...

Lower frequency should have an easier time getting through glass than that of visible light. However remote controls for electronic devices to not work when glass is in the way. Then you go down even further into the spectrum to my wireless router and it has no problem going through glass...

Homework Statement A glass vase has the shape of the solid obtained by rotating about the y–axis the area in the first quadrant lying over the x–interval [0,a] and under the graph of y = \sqrt{x} Determine how much glass is contained in the vase. Homework Equations y = \sqrt{x}...

Hi all, can someone kindly advice on how to model a femtosecond laser beam profile when it is focus on/into a transparent material. Regards Jim