Explain how light helps you to see this paper right now.  Be specific.?
918278
Without light you cannot see anything.\n\nWhy?\nBecause the light (which is consist of the colors (V I B G Y O R)\nstrikes an object. Depending upon the object, the light may or may not reflect some of the colors.\n\nWhen an object reflects some light, the object will then have a color.\nFor example, if the object absorbs all the color from the light except red, the red will be reflected to your eyes. This will make you see the color red.\nThat is, a red rose is color red because it reflects rhe color and it goes to your eyes. So you see color red.\n\nWhen an object reflects all light ( none of the color was absorb), then the object will appear white (that is the combinatio of all the colors).\n\nWhen an object reflect only green and blue, the object will appear to your eyes as cyan (correct me if I'm wrong, coz if I'm not mistaken, the combination of green and blue is cyan).\n\nThose object which absorbs all the color that composed the light appears black.\nBecause no light is bouncing back and go to your eyes.\nAnd we all know that black is the absence of any color.
1004315
Because Manufacturers can replicate light/temp/humidity etc very easially these days using modern technology. They can work out how much sun light etc a photo will be exposed to in that period (100 yrs) and replicate intensively dratically reducing the time needed to test the paper.
193833
if the paper is use white out
915429
We only see the light reflected off of an object.  Google the invisibility cloak that scientists have comeup with.  It works by refracting and redirecting light .
589230
The image of the book is not projected from the book. When you "see" an object you aren't actually seeing the object your eyes are detecting the light waves or photons of light that are transmitted from a light source then reflected off that object. If there is no light source there will be no reflected light. And you will not be able to see the object with your eyes. This only applies to visible light. If the object is warmer than it's surrounding environment it will radiate infrared light (heat) which is not visible to the human eye but can still be sensed by touch.
38508
ah, i actually remember thinking that once... i always had a lot of questions like that, always so curious about stuff... that's why im a physics major, it explains so much... actually, while we may not be tasting or smelling the same thing, we are all seeing the same colors.  this is because each color has corrosponding wavelengths and frequencies of light on the electromagnetic spectrum.  Only a very small portion of this spectrum is even visible light, and we all agree on that.  the colors you see from objects are just the wavelenghts of light that are not absorbed by that object, so therefore are reflected. so we are definately all seeing the same frequencies of light... its easier to understand with sound, if you pick different frequencies, it's a higher or lower pitch.  we can all definately agree on the pitches of sound because we can agree on whether or not the pith is higher than another pitch. if you pick a frequency on the electromagnetic spectrum in the visible light range, that frequency will correspond to a certain color. violet is the color with the wavelength of the highest frequency, meaning it has the highest energy(E=hf where h is planck's constant so energy is directly proportional to frequency.) red has the lowest frequency, and therefore energy. the colors go in order of lowest to highest energy as follows: red, orange, yellow, green, blue, violet. it is is definate that what everyone views as violet is what has the highest energy, and what everyone views as red has the lowest.  and the colors as we know them, kind of blend into each other as you go up in energy, like starting with red you can have red orange and keep adding orange till you get to orange, then add some yellow and so on.. the colors blend nicely. if someone viewed lets say green instead of orange... well then red and green wouldnt mix so well now would they? if you think about it, the colors go "up" in energy steadily just as sound goes up in pitch steadily, so we do all view colors the same.  i hope i conveyed my thoughts properly and that made sense :)
115588
look at a really really bright light
406370
More light is needed as the magnification is increased since the size of the hole of the objective lens decreases. Try it!
337135
It is because of the air bending the light slightly. Its the same as shining a light through water, but the effects are less pronounced.
208454
dunnerzplant pretty much has it right.  To give a more basic explanation, the retina has an array of "rods and cones" laid out like pixels on a tv screen, and they are all connected to the visual cortex that has a similar array of perceptive neurons that can piece all fo the signals together as a picture.\n\nDifferent cells in the retina have different chemicals that are sensitive to different colors, or wavelengths of light.  When light of that color strike that cell, the chemical does a slight shape-shift that ignites a mechanism to change the cell's output of neuroreceptors, liek a switch.  Once the light disappears, the photochemical shifts back to its latent state, and the perception of that color also ceases.\n\nIt's pretty cool stuff, really.  Any good Molecular and Cellular Biology textbook will give a good description of how the whole thing works.  I think even a basic college Biology text will give a rudimentary treatment of the subject.
710832
At the moment there is a flash, the flash is a light source. Not the camera itself.\n\nTh
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Angle at which light is totally reflected. \n\nThis website has a good diagram.\n\nhttp://www.physicsclassroom.com/Class/refrn/U14L3c.html
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All of the light "floating" in the air is composed of photons which are eventually absorbed by the atoms in the room and converted into heat.  This heat eventually dissapates through the walls and radiates outside the room.  Of course, there is an imperceptable delay between when the last photon leaves the light and is absorbed by the walls, but this happens at the speed of light and can't be seen by you or me.
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It's not a matter of great energy to travel a large distance. In a vacuum, there is nothing to stop objects. Once in motion, any object will keep going until some for acts on it. A photon(s) of light will travel untill someting absorbs it or reflects it or refracts it. Tissue paper DOES absorb light, depending on the intensity of the light, it will absorb all or a fraction of it. Pretty much anything physical absorbs light, even glass, though the absorption is very small for glass. Of course this is dependent on wavelength, some wavelenths are absorbed more than others and if you go to shorter wavelengths like x-rays, they pass right through the paper. Longer wavelenths like radio waves also pass right through.
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A complex question that needs a highly simplified answer.\n\nA photon of light has different energy depending on the type of light, some light does go through us, but that ight is not visible to us.\n\nX-rays for example pass through things nicely, however they can be blocked sometimes by dense material (such as bone and metal), X-rays are a higher energy than visible light.\nEven higher energy is Gamma rays... a photon of this form of light can theoretically pass through several metres of lead, sometimes more.\n\nAt the other end of the spectrum is Infra red light, which is just outside our visibilty, when you feel it, it is heat. Consider that it can be easily insulated just by putting some sort of thick barrier between you and it.\nAlpha and beta radiation are such low energy that they are actually particles (fast travelling helium, and protons respectively). an alpha particle can be blocked by a thin piece of paper. A beta particle can be blocked by your skin.\n\nNow... visible light is between the extremes of theose above. As an experiment hold a torch to the palm of your hand and you can actually see light coming through. SO some light does get through. But most of it does not.\n\nVisible light is a happy medium with just enough energy for us to see. Any more energy or any less energy in the light and life would be difficult\n\nConside that if we could only see gamma rays then we would not see much at all, because the gamma rays would not bounce off anything.\nAt the other end, if we could only see beta particles then the world would be very dark because all the beta particles would be absorbed before they reached us.
105534
how about adjusting the contrast/brightness settings first. 3M makes anti glare shields if needed. sunglasses would be cheaper.
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it ain't pretty but here goes nothing.\n\n\n\nsunlight is all hues\nN and O scatter the light\nblue is spread the most\n\n\n\n\nThe first thing to recognize is that the sun is an extremely bright source of light -- much brighter than the moon. The second thing to recognize is that the atoms of nitrogen and oxygen in the atmosphere have an effect on the sunlight that passes through them. \n\nThere is a physical phenomenon called Rayleigh scattering that causes light to scatter when it passes through particles that have a diameter one-tenth that of the wavelength (color) of the light. Sunlight is made up of all different colors of light, but because of the elements in the atmosphere the color blue is scattered much more efficiently than the other colors. \n\nSo when you look at the sky on a clear day, you can see the sun as a bright disk. The blueness you see everywhere else is all of the atoms in the atmosphere scattering blue light toward you. (Because red light, yellow light, green light and the other colors aren't scattered nearly as well, you see the sky as blue.)