physics phenomenons of light
218426
should be glass. unless in its original form of sand than should be water. Remember Super-man made that huge piece of glass to reflect the sun an blind those crazy alien people!
210718
All light has a velocity of "c."  c is ~ 3*10^8m/s.  With this knowledge you can say that frequency is the inverse of time/distance.  Thus, you can use the formula C(meters/sec) / Freq.(cycles/sec) = Wavelength(meter/cycle) to solve the question.\n\nDo your own work from there.
92466
Optics deals with the propagation of light through transparent media and its interaction with mirrors, lenses, slits, etc. Optical effects can be divided into two broad classes: those which can be explained without reference to the fact that light is fundamentally a wave phenomenon, and those which can only be explained on the basis that light is a wave phenomenon. Let us, for the moment, consider the former class of effects. It might seem somewhat surprising that any optical effects at all can be accounted for without reference to waves: after all, as we saw in Sect. 9, light really is a wave phenomenon. It turns out, however, that wave effects are only crucially important when the wave-length of the wave is either comparable to, or much larger than, the size of the objects with which the wave is interacting (see Sect. 11). When the wave-length of the wave becomes much smaller than the size of the objects with which the wave is interacting then the interactions can be accounted for in a very simple geometric manner, as explained below. Since the wave-length of visible light is only of order a micron, it is very easy to find situations in which the wave-length of light is very much smaller than the size of the objects with which the light is interacting. Thus, ``wave-less'' optics, which is usually called geometric optics, has a very wide range of applications. \nIn geometric optics, light is treated as a set of rays, emanating from a source, which propagate through transparent media according to a set of three simple laws. The first law is the law of rectilinear propagation, which states that light rays propagating through a homogeneous transparent medium propagate in straight lines. The second law is the law of reflection, which governs the interaction of light rays with conducting surfaces (e.g., metallic mirrors). The third law is the law of refraction, which governs the behaviour of light rays as they traverse a sharp boundary between two different transparent media (e.g., air and glass).
122030
Light is a form of energy...\n\nIt is an electromagnetic radiation that can produce a visual sensation.\n\nhttp://www.schoolingkids.com/\nhttp://www.futureaccountant.com/
119843
Not alot actually. Photons bounce around like crazy. When white light strikes a surface some of it is absorbed by the molecules in it. The rest bounces off. When that light hits your eye you see the light whithout the wavelength the surface absorbed giving you the perception of colour. If all light was stopped by matter it would be pitchblack all around you. \n\nNo surface reflects 100% of the infalling light however. Some is always absorbed by atoms and molecules (that become excited ot more energetic) no mather how reflective the surface or transparent the substance. Water may appear completely transparent but only a few hundred meters beneath the surface of the ocean it is quite dark because the water has absorbed the sunlight.\n\nLight ends when a photon is unable to move. A photon is composed of an electric wave and a magnetic wave. Pure energy that is. The higher the frequency of the photon the less likely it is to be stopped by an atom (atoms are composed mainly of empty space). So gamma rays (the photons with the highest energy) are able to pass through matter. But most photons will be stopped by an atom eventually and when that happens the energy of the atom is taken up by the electron in it. The electron moves into a higher orbit: the atom has become excited. Usually, when the electron moves back into its ordinary orbit, the energy is rereleased as heat (low energy infrared photons). Sometimes the energy is rereleased as a photon of a different colour (frequency). The substance glows.
2621
here's a site with pics that might give you some ideas:\n\n\nhttp://www.physics.usyd.edu.au/competition/comp1998/comp98.html
71209
Modern physics is showing that light can actually be both at the same time.  As the quote shows below:\n\n"Light can also behave as a particle and a wave at the same time. An example of light acting as both a particle and a wave is the digital camera---the lens refracts (bends and focusses) waves of light that hit a charge-coupled device (CCD). The photons kick electrons out of the silicon in the CCD. The electrons are detected by electronics that interpret the number of electrons released and their position of release from the silicon to create an image. Another example is when you observe the build-up of the alternating light and dark pattern from diffraction (a wave phenomenon) from light passing through a narrow slit. You see one bright spot (a photon), then another bright spot (another photon), then another... until the diffraction pattern is created from all of the accumulated photons. This happens so quickly that it is undetectable to the human eye."\n\n- http://www.astronomynotes.com/light/s3.htm\n\nThe interesting thing about the duality of light is that it still isn't entirely understood, and the people who understand it don't do a good job explaning.  Here is a link to a website that discuss the experiments which helped discover the wave and particle-like properties of light (and all matter in fact!).\n\nhttp://hyperphysics.phy-astr.gsu.edu/hbase/mod1.html
146012
This is either a really stupid or really intelligent question.\nPerhaps he is questioning the try all paths theory of photon behaviour on a quantum level? It is possible, but so unlikely you may as well consider it impossible.\nIn a normal situation, it is impossible for light to randomly appear.\n\nCombustion isn't needed for light either though, if you're asking if light can be created through other means than combustion? A laser doesnt combust....
398999
Hi Scarlett,\n\nFirst of all, visible light waves consist of a continuous range of wavelengths or frequencies. When a light wave with a single frequency strikes an object, a number of things could happen. The light wave could be absorbed by the object, in which case its energy is converted to heat; the light wave could be reflected by the object; and the light wave could be transmitted by the object. Rarely however does just a single frequency of light strike an object. While it does happen, it is more usual that light of many frequencies or even all frequencies are incident towards the surface of objects. When this occurs, objects have a tendency to selectively absorb, reflect or transmit light of certain frequencies. That is, one object might reflect green light while absorbing all other frequencies of visible light. Another object might selectively transmit blue light while absorbing all other frequencies of visible light. The manner in which visible light interacts with an object is dependent upon the frequency of the light and the nature of the atoms of the object.\n\n"White" or natural light is made up of different colours (as in a rainbow) and Isaac Newton showed that these could be shown by shining white light through a prism.\n\nWhat "colour" we see an object depends on what wavelength of light it does not absorb and that depends on what the chemistry of the object is. This is because the electrons in a substance will vibrate at a certain frequency depending on what the construction (i.e. what the chemistry) of the atom is. Accordingly this will either absorb (interfere) or coincide with the wavelength of a particular colour.\n\nThus we will always see different chemicals as different colours (ie. wavelengths).
94128
People sort of understand waves and they understand particles, light might be a disturbance in the space time continum. Just a definate bit energy with an uncertainty where it is, traveling. Some "particles" exist for such a short time , they are more a resonance. I am looking forward to new research and thoughts on nature of light.
116633
1) Light is both a wave and a particle phenomenon. Experiments can be devised to demonstrate either the particle or wave properties of light, just not at the same time (see 'particle wave duality').\n2) About 1,000 seconds. An astronomer named Christian Huygens (I think... might've been Oersted) first observed a 1,000 second discrepancy in the observation of Jupiter's moons eclipsing when observed in the summer as opposed to in the winter. This led him to the first good approximation for the speed of light, i.e. the extra time it took the light to cross the diameter of Earth's orbit could be measured, and since the approximate diameter of Earth's orbit was already known: Speed = Distance/Time or 186,000,000 miles divided by 1,000 seconds = 186,000 miles per second.\n3) The light year is a unit of DISTANCE, not TIME!! It is the distance that light travels in one year, or about six TRILLION miles. However even at this staggering speed it takes light over four years to reach the nearest star to Earth (other than the sun).
34215
The splitting and shift of a spectral line into several components in the presence of an electric field.
122567
Light of a form of energy. Energy is the only thing in universe. There are different forms for energy. Light is just another form of energy - A radiation. \n\n   Hope you know that matter (whatever it is) is just Energy got trapped in space. Matter produces energy in-order to maintain its stability. That may be a chemical reaction, a nuclear reaction or even annihilation. This released energy may contain light energy and so light is produced.\n\n  There are different theories to explain what is light.\n\n1. Newtons Corposcular theory - Light is a stream of corpusles (small balls) - and thus exhibit a particle nature.\n\n2. Hygen's Wave theory - Light is comprised of compressions and rare-fractions and thus exhibit a wave nature.\n\n3. Maxwell's Electro-Magnetic theory - Light is a combination of electrical and magnetic field perpendicular to each other - travells in a straight line in a constant speed.\n\n4. Max- Plank's Quantum theory - Light cotains packets of energy - called photons. The packets are called Quanta\n\nThese theories are quite old and some how relevent even in theses days. Today we know that light exhibits both particle and wave nature.\n\nLight exists for ever. - It is never created nor destroyed.\nIt only changes its form.
657067
Yes! in the Sub Atomic particle. Photons behave the same way.
417553
No, not really.\n\nEven high school labs now do light experiments that show photons are quanta.  One simple experiment, is with the photometer that emits electrons when struck by light.  The electrons are like billiard balls and the photons are the cue balls striking them to send them on their merry way.\n\nIf light were simply a ray (a force field), the amount of electrons emitted would be proportional to the strength of the light beam.  But they aren't and the number of electrons actually follow a step-function where at a given threshold of light, the electrons suddenly burst forth after none up until that threshold.\n\nThe photon concept, as bundles of energy, is the result of what I would call good physics.  Good physics is physics that starts with the physical phenomenon and then derives equations to explain it.  Bad physics, like string theory, starts with the math and then tries to explain a physical phenomenon, like strings.\n\nAs to your last assertion, think about it...would even physicists, who are renowned for their weird jargon, call something a "matter," which is a synonym for "mass" if it were not a mass?  No, dark matter is a mass...more correctly a mass-energy (due to E = mc^2).  DM accounts for about 96% of all the mass-energy in our known universe.  \n\nUntil just recently, DM has not been observed, which is why they called it dark.  But a recent observation of two galaxies colliding has seen the effects of the dark masses surrounding those two galaxies also colliding.  So, there is now observable evidence that the dark matter exists...the theory has been validated. [See source.]
550857
light is (in a nutshell) waves of energy. Waves (in general) travel in a straight line. stars are so far away that not much of their energy or waves hit the planet.
547689
Maybe you want to think along the lines of a change in energy state and a resultant heat ( gain or loss ) absorbing light in a given wavelength range.