Glass Definition and 635 Threads

Homework Statement A beam of light, wavelength 625 nm in air, is incident on a block of flint glass at an angle of 31.5. Find: A) the speed of light in the flint glass Homework Equations Don't know where to start The Attempt at a Solution refractive index of 1.61 625 / w = 1.61...

Why when sometimes touch the glass balloon around the light bulb, it is hot?

Homework Statement Using a microscope, smoke particles can be seen moving inside a glass tube. They appear as tiny spots of light that move in various directions. The air molecules inside the glass tube cannot be seen with the aid of the microscope. a) State why a microscope is needed to...

can i use a watch glass as a primary mirror of dobsonian telescope?

Why can visible light pass among glass? Why glass is is transparent to visible light?

Why I can burn a paper with magnifying glass and sun? Isn't it something to do with the electromagnetic field (because light is itself electromagnetic field)?

If you fill a glass with water and hit it on the side with a knife then you get a higher pitch the more you fill it up. Why is this? When you hit the glass you aren't really making the air in the glass vibrate as you do when you blow over the top of a bottle, you're just making the glass...

Homework Statement An object is kept at a distance d=2.5cm from a Glass sphere of radii R=10 cm .Find the final image of the point object? \mu =1.5Homework Equations \frac{\mu_{2}}{v}-\frac{\mu_{1}}{u}=\frac{\mu_{2}-\mu_{1}}{R}The Attempt at a Solution it is a simple question where we have two...

If 0.22L of tea at 95 degrees C, is poured into a 150g glass cup initially at 25 degrees C, what will the final temperature be, assuming no heat is lost to the surroundings?

A double-slit experiment is set up using a helium-neon laser (lambda =633nm) . Then a very thin piece of glass ( n=1.50 ) is placed over one of the slits. Afterward, the central point on the screen is occupied by what had been the m = 15.0 dark fringe. How thick is the glass? I really need...

If a glass of water is resting on a table and there is a piece of paper or cloth or whatever under the glass, and you pull the paper/cloth really fast, the glass does not move. Can someone please explain the physics of this to me. THNX

Glass is Green? when the glass is viewed at their edge , it looks green . 1.why it is green when viewed at the edge ? 2.Why its not green when we view other than the edge ? i think polarization is the effect but if so,how does it take place . please help me in this...

Bought these two glass bulbs at a local art fair, the other month Size and shape as in Christmass tree balls, of hand blown glass but with a complex delicate glass object inside. Looks like ship in a bottle, but how do you get an object like that inside during the glass blowing...

http://session.masteringphysics.com/problemAsset/1011752/15/1011752A.jpg 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. View Figure The top of the bottle has...

Problem: red light of wavelength 560nm is passed from air into glass where its velocity is 1.96 x 10^8 m/s. (c=3*10^8) Find the frequency of the light in air and the wavelength of the light in glass. Can someone please tell me what c is and what formulas i need to use. thanks

Given a wine glass with angle theta, height h, what diameter ball, when placed in the wine glass will displace the most volume?

Homework Statement So I need to get a rough calculation: At what angle does drops of water start rolling down a plane of glalss. This is for my project where we are using a solar still to purify water. I just need ot get a rough calculation so I know at what angle to tilt the plane of glass...

Hello, I've been to a couple of towers in the world (CN and Blackpool) with specially build glass floors that you can safely walk/jump on. In each case, claims have been made stating that the glass is capable of withstanding a particular weight or pressure. Intuitively, I feel I would...

Sorry for misconception. Why the mirror deflects light was the question? Because of the electronic configuration and how?

Normal glasses have a larger refractive index for blue than for red. Are there special glasses that differ in this respect? Or maybe are there some minerals that behave differently, still being transparent in the visible spectrum and colorless? Thanks to tell me if you know something about...

In a local bar, a customer slides an empty beer mug down the counter for a refill. The bartender is momentarily distracted and does not see the mug, which slides off the counter and strikes the floor 1.40 m from the base of the counter. If the height of the counter is .860 m, (a) with what...

Hello! I'm stuck on this problem... A thin flat plate of partially reflecting glass is a distance (b) from a convex mirror. A point source of light (S) is placed a distance (a) in front of the plate so that its image in the partially reflecting plate coincides with its image in the mirror...

any one know bout Bulk Metallic Glass (BMG)

So I'm building this glass table, and I'm going to put a few led's around the edges so i can light up the table if i need to find something in the dark (like while watching a movie). and I want a cool way to turn on the light, so I was thinking about making a circuit that when you tap the table...

I had a glass coffee table, it was 12mm thick (approx 1/2 ") I had this table for approx 5 months when one night, it just gave off a bange and collapsed (I wasn't in the process of placing anything on it, etc, it had no chips). Some small fragments were embeded into my wife and my hands. The...

Why is glass "QM transparent"? Sorry if this is a basic question. Why is a wave state preserved through it's interaction with glass, mirrors, air, etc.? Why doesn't reflection (absorbtion then re-emission) fix the position and collapse the function? It's isn't really the same photon that...

I am having a huge problem with understanding the derivation of velocity profiles for these type of problems. The one i am having the most difficulty is the flow of oil going down vertically along the surface of a glass rod. Where p=900 kg/m^3 and u=120 mPa's. How do I start this problem?

Question Two glass plates 10.0 cm long are in contact at one end and separated at the other end by a thread 0.0500 mm in diameter. Light containing the two wavelengths 400 nm and 600 nm is incident perpendicularly. At what distance from the contact point is the next dark fringe? Relevant...

Glass is a solid? It is made up of molecules which is similar to what many other solids are made of? Then why is it transparent? Is it that the color of the molecules in glass are transparent and those in other solids are not? For that matter what is the color of molecules(atoms) in general?

Homework Statement Suppose a reflected white light is used to observe a thin transparent coating on glass as the coating material is gradually deposited by evaporation in a vacuum, Describe color changes that might occur during the process of building up the thickness of the coating...

I'm confused with a simple physical explanation as to why glass is so transparent. I would assume crystalline material would be 'more' transparent than glass since the lattice structure is ordered and light can pass through in an ordered manner. Normal glass is an amorphous structure...

Homework Statement A glass has a height of 10 cm, and a diameter of 2 cm, it weight 300g and a coefficient of friction equal to .30 exists. Will it slip or tip? Homework Equations ? The Attempt at a Solution Im almost certain there are no calculations informed since i have been...

Why the mercury in glass-laboratory thermometer doesn't stick to glass?

After doing a lot of reading in a business management class last semester, I noticed the glass ceiling plays a huge role in managerial positions throughout the world. However, I noticed that science and engineering industries are rarely mentioned during these articles, reports, etc.. My question...

Wasn't too sure where to put this as it is not actually homework. Anyway, I've been called upon to do a presentation on a material for prospective Physics students. I was going to do ferrofluids as they look extremely cool, but they want a material with a proper use, therefore I have chosen to...

Homework Statement What is the velocity of the water at the top of a glass of water? Is it really 0? For example, there is a lot of problems which asks with what velocity does the water would leave that glass if I make a hole on the bottom. For these, we consider the velocity at the top to be...

Hiya. I'm really stuck on the following question. I think that I have got part a alright, but I've no idea what to do for part b. Any help would be really appreciated. The refractive index of glass is 1.643 for blue light, and 1.618 for red. (a) Calculate the difference in the speed of...

Uhmm.. i faced some problem with my experiment of finding the thermal conductivity of glass..i hope that someone can help me. May i know the extimation of the thermal conductivity of a boiling tube?? isit the same as the thermal conductivity of pyrex glass?? when i want to find the radius...

For my Production and Layout II class I need to come up with a a fictional product I'm trying to sell in the ad. Getting to the point, I want to use a http://pomwonderful.com/pomTeaHome.html" glass as my container, but try as I might, I can't get the lable off the glass. Even with my Dremel set...

Homework Statement A glass of water with a mass of 500 g is being pushed horizontally at thetop across a table. The base is 1.5 cm in diameter and i is 5.0 cm tall. The coefficient of static friction is 0.20. Will it slip or tip? Homework Equations Not entirely sure.The Attempt at a...

I don't have a diagram for this, so I'm going to do my best to describe it. A glass tube lying horizontally has three different cross-sectional areas, A, B and C. Area A is 12 cm^2, B is 5.6 cm^2, and C is 6.0 cm^2. Mercury (density = 13,600 kg/m^3) is being pushed through the tube by a...

Homework Statement A glass cube has a small spot at its center. What parts of the cube face must be covered to prevent the spot from being seen, no matter what the direction of viewing? What fraction of the cube face must be covered? Assume a cube edge of 1 cm and a refractive index of 1.50...

Rubbing your finger around the rim of a wine glass produces a fine tone.It seems that my litle kitchen-table experiment produced 1000 Hz at a higt amplitude and the first overtone 2000 Hz had a small amplitude, 3000 Hz was higher and so it seems wiht 5000 Hz. So the even overtones are...

Hi to all! I have a little question for you. Does a b&w glass filter exist? I now there are all kind of color glass filters, but I want to know if there are any possibilities to generate a b&w image without using your camera or your computer. I know about the monochromator device, but it...

A little math help please. If I wanted to build a centrifuge to spin a glass disc 12" in diameter to test the thicker at the bottom myth, how many rpm do I need to get approx. 1000G at the edge of the disc? (I have been in an engineering career that doesn't require math for so long I forgot...

laser beam of dia=D strikes at theta.i an n.t=1.5 glass pane. what is the diameter of the beam in the glass... i started by setting up a geometric interpretation of the phenomena and concluded that the light would remain columned and both sides of the beam would simply shift from theta.i to...

Two non-parallel light rays initially converge to a single point on a screen. A rectangular block of glass is now placed somewhere in front of the screen, in the path of the light rays, so that the glass surface is parallel to the screen. Where is the new convergence point of the rays? 1...

Why Do Glasses Doesnt Have A Melting Point? And Are Glasses Liquid?thanks

This is my first time posting and need your opinions to help ease my wife's anxiety on a strange happening this morning. She went to bed last night, brought up a glass of soda, drank half of it and placed the half full glass next to the bed on the night stand. The alarm clock went off this...

THATS OUR RESEARCH TITLE AND IS THAT POSSIBLE ?:rolleyes: CAN YOU GIVE THE COMPOSITION OF BANANA LEAF EXTRACT