Visible light Definition and 99 Threads

Is there an equation for force due to electromagnetic radiation? For example, is there a force due to orange light?

Is long distance "visible light" transmission possible? Hi Lets say i need to transmit a lot of visible light from one place to another. Is this possible to do on long (50~100 miles) distance?

Hi, A colleague of mine at work has this idea of using a focusing lens to focus the visible light into a optical fiber and guide it to some destination, e.g. room with no windows. I have no experience in optics, or in QED (only some "layman" knowledge of monochromatic light and its...

Inelastic scattering of Xray photons from electrons give them a wavelength shift, the Compton effect. The shift is inverse proportional with the mass of the electron. Now, if visible light scatters inelastic from electrons in graphene what will be the wavelength shift? The electrons in graphene...

what do we mean exactly by visible light? Since light is oscillating electric and magnetic fields, and both electric and magnetic fields are invisible, what do we actually see? is color the wave itself?when we see colors do we see the waves themselves and if their wavelength were bigger would...

I got this thing from wikipedia: http://img72.imageshack.us/img72/9878/vlszo.jpg Link to wikipedia: Visible spectrum So: - Is it the right scan of visible spectrum? Because when I search, there are a lots of other version, which is not really like each other. (Google Link) - What is the...

Hi all, is there an efficient way of splitting both of these waves of sunlight?? I've came across http://coolcosmos.ipac.caltech.edu/cosmic_classroom/classroom_activities/herschel_example.html and thought of an idea of using a prism. But, do you think that is is efficient? ( I'm going to use...

Bohr Model [b]1. Assuming that the wavelengths of visible light lie between about 300nm and 700nm, what transitions in Li++ (hydrogenic lithium ions, Z=3) would be visible. Identify each transition by initial and final principal quantum number n. Also identify those transitions that are also...

[b]1. Assuming that the wavelengths of visible light lie between about 300nm and 700nm, what transitions in Li++ (hydrogenic lithium ions, Z=3) would be visible. Identify each transition by initial and final principal quantum number n. Also identify those transitions that are also seen in...

According to my understand of what makes something transparent, it's because a given wavelength of light doesn't have sufficient energy to raise the electrons in a material to a higher energy level, so the photons are not absorbed and continue on. This explains why glass is transparent for...

Hey guys, it is possible that to observe the energy outcome of visible light? By adding colored frame in front of the light source and shined on a beaker with water Using data logger to record the data, how long should I take the experiment? Thanks for helping

Is there plasma that doesn't radiate visible light? I think the electrons falling back to the nucleus radiate visible photons. But what if the plasma only has particles that are not atoms?

In a light bulb, is the filament made up of elements which each produce a colour of visible light to make white?

Hi .. May i ask why does a infrared photograph of a person look different from a photograph taken from visible light ? Relevant Equations : V = ƒ x lambda I believe it has got to do with the wavelength or frequency. However, i can't explain it ..

If so, then that means they can cause things to warm up right?

If an oscillator were to ever reach the visible spectrum, would an antenna connected with the oscillator output generate light?

Will it emit all frequencies lower than visible light? For example, a candle will emit all radiation, but no higher than visible light.

When the electrons in silicon are excited by visible light and jump into the conduction band how do the electrons replace? So for example, wouldn't a solar cell only last for so long if all the valence electrons are excited and converted into current. I am looking at it as if all the valence...

A colleague and I are in our 4th year of Electrical Engineering and are designing a Visible Light Communication device capable of sending text, pictures, videos, etc over a binary light channel. We are currently using an FTDI chip to interface between the USB and receiver/transmitter. According...

Hi! I did a laboration on detecting different wavelenght from a UV-c light tube and the electrometer detected some activity from the Monochromator in the area of visible light (400nm-700nm). I would like to know if this has something to do with the quality of the light tube? Or does something...

I have been wondering how to realize the color of a mineral by having the absorption Spectra... The following case is an example; The image is the absorption spectra of a Bolivian Amethyst which looks like this; [PLAIN]http://www.tequilabay.com/amethyst300lbbolivian.jpg I have tried...

If, for argument sake, you had a spaceship that could go thousands of times the speed of light what would happen to the electromagnetic radiation being emitted from the stars you head towards and away from? Would the stars that you are traveling towards get duller and duller the faster you go...

In spectrum of EM radiation domain of visible light isn't strictly limited. In books is usually given from 400-800nm. But for visible domain short-wave limit is \lambda=430nm, and long-wave limit is \lambda=690nm? Why we say then that the boundaries are 400-800nm?

Is there a way to change visible light like the light coming out of the screen you're reading into infrared or any other invisible light and then take that and change it back somewhere else? What I'm what I'm trying to do is make a computer screen or maybe a T.V screen visible to only those who...

Energy <---> Mass conversion and visible light We are all familiar with the following concept: E = MC2 and M = E / C2 My question goes as follows, theoretically speaking, if at my disposal is adequate amount of energy to convert that energy into a mass of 6×1024 KG, what is the length...

is it possible to have a material block high wavelength waves but not low length waves? Gamma rays can pass through objects that visible light cannot. Any thoughts? I was thinking a certain bandgap?

I'm trying to get a better understanding of color and visible light in general and see how every single visible color is formed. Does this sound right? The sun sends us white light which is a mixture of all the monochromatic colors that our eyes are sensitive to and when we mix both sides of...

a.) If the average frequency emitted by a 200 W light bulb is 5x10^14, and 10.0% of the input power is emitted as visible light, approximately how many visible-light photons are emitted per second? I solved this part of the problem by finding the energy (E = hf) and dividing 10% of 200W by...

Why are we unable to see light except if we are looking at the light source or a source that is reflecting the light? For example; say we set up a powerful laser but we cannot see the origin or the end point. The a vacuum is produced in the room to remove all possible particles that might...

If you could get a circuit to oscillate quickly enough, could visible light be produced using a simple metallic antenna?

Homework Statement I have conducted an experiment which attempts to calculate the range of the visible light spectrum. Basically white light was shined through a diffraction grating (300 lines/mm) and diffraction theory is applied to calculate the wavelength. So, here are the variables...

Please take a look at this link http://www.warpedspace.org/lightingT/Images/LightProperties/LightReflection.jpg My question is: why can we see the blue floor but not the incident and reflected rays of light?

The filament of a bulb when it gets heated to some threshold level generates the visible light. My query: 1. Why is it called electromagnetic then? Here, if i understand correctly, the waves are produced by the energy emitted by the transition of the electrons between various orbits of the...

This is purely a question I know little or nothing about light and the whole EM spectrum for that matter I was just wondering something. Why are visible light waves so puny compared to other frequencies on the EM spectrum. What I mean is that I can send a pulse to an antenna and emit let's say...

We did a chemistry experiment were we burned different metal chlorides on the bunsen to observe the different flame colors produced. Anyhow I'm writing up the report but there's one thing I'm not sure about. I can't make any mistakes because I made the mistake of displaying way too much...

If I get this whole “Moving magnet and conductor problem” business at all, one frame’s electricity is another frame’s EM wave. So moving a magnet causes an electromagnetic wave, AKA: photon. I assume the faster you move it, the higher the energy of that wave/photon. (Maybe you have to vibrate it...

What property of visible light defines its color, the wavelength or frequency (or something else)?

I am aware that the reason we cannot see things around the size of atoms is due to the fact that the wavelength of light is too great. My question is why can you not modulate light, as you do with FM radios, to a higher frequency and therefore a shorter wavelength? Would that not enable you to...

Homework Statement UV light causes sunburn, whereas visible light does not. Explain. Homework Equations N/A The Attempt at a Solution I'm guessing that it might have sinething to do with the electromagnetic spectrum.

The amplitude of sound waves is commonly referred to as volume. What about for blue visible light, and microwaves? I'm guessing for the first one it's brightness. Btw I'm looking for a word answer, not the magnitude of the amplitude (not a numerical amplitude) Thanks for reading.

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

A disabled tanker leaks kerosene (n=1.2) into the Persian Gulf, creating a large slick on the top of water (n=1.3). If you are scuba diving directly under the region of the slick, whose thickness is 460nm, while the Sun is overhead, for which wavelength(s) of visible light is the transmitted...

Homework Statement Why can't you make radio transmitter that transmits visible light instead in the same way we transmith AM signals? Homework Equations The Attempt at a Solution Im thinking maybe they would not be very effective as their wavelenth is so small, they would die...

A tiny layer of oil (n = 1.25) is situated on top of a water puddle (n = 1.33) in a parking lot. If the thickness of the oil is 242 nm, the what color(s) of visible light will give a strong reflection? 2t=m*lambda/n2 2t=242nm/1.25 and then 2t=242nm/1.33 i just don't know what goes where...

why is it extremely dificult to observe the compton effect using visible light? is it because visible light does not have a short enough wavelenght to excite the electrons?

Hi, the title above is a specific instance of a more general question. I'm basically wondering why the atoms in a wall would prevent visible light from passing through, yet allow both X-rays (which are HIGHER frequency) and radio waves such as 802.11b wireless internet (which are LOWER...

I've seen those filters for cameras (etc.) which look black (because they don't pass almost no visible light), but they allow infrared light to go right thorough it. What is it made of? (i tried to find out on my own using google; I tried to find out what elements absorb what wavelenghts, but...

Wavelenght of Visible Light? is it 400nm to 800nm or is it 450nm to 750nm thanks nautica

Im not sure of this, but visible light is an EM wave just like radio waves are, right? If I am right, does that mean mirrors reflect all ranges of EM waves, radio included? Also what is it about a mirror that reflects photons?