How can we see because of light. Answer this exactly.?
922837
light, (in the perspective you are talking about) would be, more specifically- visible light.  This light in particular consists of a specific range of of vibrational frequency.  (dont know the range off hand) now, set that aside for a moment.  OKay. Now, through a process known as evolution (inhereted change in dna over time) moleculres began to form in ways that were able to carry out very specific functions. this continues until you have cells and then cells aquire specific functions.....nervous systems develope and with the a nerve cell that responds and is stimulated (specifically) by the particlar wave frequency of visible light(mentioned earlier) now, the visible light spectrum is like the key ( the receptor being the lock) and it activates the cell which then sens an action potential (depolarization) of the cellular membrane at what is known as the site of excitation.  at this site, ion channels open and + charged sodium ions are transported into the cell axon where there is the reversal of the net negative charge.  (keep in mind this is all on the one cell being stimulated) this reversal of the charged is the action potential.  By reversing the charge it has a gradient-like affect which causes an electrical current which travels the length of the axon to what is known as the "terminal buttons" which then enscribe the elctrical message into a chemical message; known as a neurotransmitter , which is then sent across a fluid filled gap between this cell(transmitting neuron or pre synaptic neuron) and the recieving neuron or post synaptic neuron.  The gap is known as the synaptic cleft.  This neurotransmitter is accepted by a form of endocytosis by the recieving neuron and the process continues till the message reaches the brain. here, it gets very detailed and very complex and requires the reading of books not message bored summaries.
425318
Light is photons and photons have mass. You missed the point of the equation entirely. Reverse it: m=E/c^2. Solve the equation for mass. It proves that the photon not only has mass but the exact mass of the photon in question.
979220
Albert Einstein answered this question a long time ago.  He theorized (and every experiment since then has borne him out) that the speed of light is constant from ANY inertial (non-accelerating) frame of reference.  This includes the speed of light relative to your headlights.  \n\nLight speed is constant.  What changes is time and length.  Weird but true.
859647
The speed of light is an illusion imposed upon us by the Almighty. He lets you see the light whenever He wants you to.
64267
Well, if you're traveling faster than light, then the light can never be in front of you.  There would be just a big nothing, probably drive you crazy if you looked at it.  I know, I come from andromeda.  We travel through space backwards so we can see where we're going.
532772
nothing but light can travel at light speed.  the faster you go, the more energy it requires to accelerate.  at speeds that are close to the speed of light, you would need what is basically an infinite amount of power to accelate.  with current technology, it is impossible.  the only reason light can travel that fast, is because when it is created it is already traveling that fast.  it doesnt have to accelerate.
377296
It seems you are having some misconception about light waves.\n\nLight is energy transformation and it is not matter.\n\nConsider a ray of light. You will draw a line alone and not a wave. \n\nNow consider a point on the line.  The light intensity at this point changes periodically; starting from zero, increases to a maximum, decreases to zero again increases and again to zero. This is repeated periodically.\n\nReading the above lines many come to a conclusion that at this point some thing increases in SIZE; like a wave in water. Once again remember this is energy and is not matter.  Wave like pattern is only an analogy and nothing is displaced at the point. EVERY THING HAPPENS AT THE SINGLE POINT ALONE.\n\nIf we draw a graph, the  locus of all points will look like a wave and  this is what we say light travels in the form of wave and there is  no physical form of wave. \n\nLight possesses wave like properties and light itself is not a wave.
763691
Light is not an object, therefore it can't stop moving.  It travels is all directions.
619887
How can I answer that?  If I didn't know then how could I tell you what I didn't know?\n\nHowever, the ten thing that I do know that I think are interesting are:\n\nThe speed of light is constant no matter the respective velocities of the source and the observer.\n\nThe rate of time passage is not constant.\n\nHot water will freeze faster than cool water.\n\ne=mc^2\n\nWhen you stand still, you are moving in 8 different directions.\n\nL’ = L sqrt(1-v^2/c^2)\n\nM’ = M/sqrt(1-v^2/c^2)\n\nAbsolute Zero (not my physics grade, but close)\n\nClarke's Orbit\n\nAvagadro'w number\n\nPlanket's Constant\n\nThe Big Bang\n\nBlack Holes\n\nString Theory\n\nGravity Bends Light (not really, but the effect is the same)\n\nNeutrinos\n\nGirls (Ok, that's biology not physics, but I am listing more than 10 anyway)\n\nThe expanding universe\n\nrefraction of light\n\nSpectrograms\n\nAnd, I could go on and on.  When you look deep enough to understand things, it is all interesting.
322359
Because light is just a wave. It doesn't have any mass. It's an electromagnetic wave, just like radio waves and x-rays.
1053030
Everything you see comes from light that enters your eyes.  The study of light is called OPTICS it is part of the science named PHYSICS.\n\nWhat your reflection looks like depends on a lot of things.  How large is the sphere? Where are you standing in the sphere?  If you think about it, what you see in the mirror depends on where you stand.  You can try this in just a regular flat mirror.  Stand in different spots, and look at what you see.\n\nI have given you a few links showing diagrams of how light rays are reflected in a spherical mirror.   If you were inside, you would be seeing a concave surface.\n\nEscher drew pictures of what he would look like in a spherical mirror, from the outside.  You can do this yourself,  by looking in the gardening area for a mirror globe, or a glass Christmas ball.\n\nA concave reflecting surface can be found in a magnifying mirror, or in a spoon or bowl.  I have also included a link to purchase spherical mirrors and other optical  devices.  Finally, I have included a site with some virtual optical experiments.\n\nI hope this helps to answer your question.  Have fun!
111323
I see the point in your question.  I think you are asking why  do we not see an aura of light, since light would still be passing around us.\n\nLight is an electromagnetic wave (OK, some might say rightly that this is debatable since it sometimes displays properties more accustomed to matter.  However, this dual nature does not imply that light is not an electromagnetic wave).\n\nThat said, one must understand that the e-m wave in itself is invisible.  It is the retina in our eyes which is sensitive to these rays.  Imagine this example.  Light a torch in a dark and clean room (no dust flying about!).  You would see the paper, but you won't see the light travelling from the torch to paper!  That is unless dust, or humidity, reflect this light and you would see a beam of light.  Similarly if you take a magnifying glass, you can see the image, but can you see the light coming out of that image? No.\n\nSo, though light would be passing around us, since nothing, except of course the Moon, satellites, and planets would be reflecting it, we cannot see it!
489247
Our eyes perceive energy in the visible light range that is either emitted from a source, or reflected off an object.  In space, the light sources are stars, like our Sun.  Objects like planets and comets and asteroids and dust, reflect the light emitted by the stars.  Since space is a vacuum, there isn't anything to reflect the light, therefore it is black.
45561
This is where The Theory Of Relativity starts to come in to play. Relative to your position in the car traveling at the speed of light, the headlights come on and illuminate your path. Relative to someone outside the car watching you travel the speed of light, nothing happens, no light travels outward past the headlamps.
692949
it was an assumption of newtonian mechanics, you might be taught it in school but Einstein and I believe a couple others showed evidence for the curvature of light. Its a small curvature, so unless your looking at a very long distance the curvature is negligible.
13401
It's true that the speed of light is constant no matter what speed at which you or the source is moving.  This is a fundamental postulate of relativity, and there is no explination.  It's just accepted because our experiments indicate that it is true.  You used the formula "lights speed + X = actual speed"  this type of velocity addition is called "Galilean".  It turns out that speeds don't actually add that way.  Far out.\n\nWhere is the rest of the energy? Good question.  The frequency of the light you observe from the sun DOES depend on how fast you and it are moving.  The energy of each photon is given by E = hf, where f is the frequency of light.
1122883
A white object spreads the light into many directions. A mirror doesn't, it instead keeps the light focused, which is why we can see our images.