Does light generae heat or heat generate light?
437461
Both are true, this is because heat IS light.\n\nHeat is actually the common word for 'Infra Red Radiation'... but of couse heat is shorter and easier to say. IR radiation is a form of 'light' that is just beyond our visible spectrum.\n\nWhen any type of light hits matter it causes the molecules to vibrate, this can cause IR radiation to be released, thus being felt by us as 'heat'.\n\nLikewise, when molecules are heated up, such as in a fire, they vibrate and can often release light that we can see.\n\nA fire, for example, releases a large amount of light in the red area of the spectrum thus appearing red and yellow... this happens to be near the infra red part of the spectrum, so it is hot too.\n\nCOMPLEX VERSION:\nIn an atom there are electrons, when light hits an electron it gains energy. The electron then slowly looses energy in the form of electromagnetic radiation.\nElectromagnetic radiation that is releasesd is dependant on the element, bonding involved, and the electron orbital. thus a wide variety of light can be given off.\nLight can include both visible light and infrared light... infra-red light being that which causes us to feel heat (due to its ability to vibrate the molecules of our bodies).
55652
light density or intensity? if you're talking about intensity then it depends on distance. that's an inverse square relationship.
1184305
Kirchoff postulated three empirical laws describing the spectral composition of light emitted by incandescent objects.\n\n1) A hot solid object produces light with a continuous spectrum. \n2) A hot tenuous gas produces light with spectral lines at discrete wavelengths (i.e. specific colors) which depend on the energy levels of the atoms in the gas. (See also: emission spectrum) \n3) A hot solid object surrounded by a cool tenuous gas (i.e. cooler than the hot object) produces light with an almost continuous spectrum which has gaps at discrete wavelengths depending on the energy levels of the atoms in the gas.\n\nKirchhoff's current law: The principle of conservation of electric charge implies that: At any point in an electrical circuit where charge density is not changing in time, the sum of currents flowing towards that point is equal to the sum of currents flowing away from that point.\n\nKirchhoff's voltage law: The principle of conservation of energy implies that: The directed sum of the electrical potential differences around a circuit must be zero. (Otherwise, it would be possible to build a perpetual motion machine that passed a current in a circle around the circuit.)\n\nhttp://en.wikipedia.org/wiki/Kirchoff
1011453
when things gain energy, their particles heat up and begin moving, but what also happens is that the electrons in the substance are given enough energy to jump energy levels. This is unstable, so they fall back down to their ground state and give off energy in the form of light (red hot, white hot).
1051416
By heat (because you use the term reflection) I presume you mean radiant heat, in which case the answer applies to ALL radiant energy.\n\nEvery photon has a particular energy determined by its wavelength. When it hits a surface this energy can be transfered to the atoms and molecules that make up the surface. However, atomsand molecules obey the rules of quantum mechanics, and so the vibrational, rotational and electron energies are all quantised. If the photon has the right energy it will probably excite the atom or molecule and its energy will be transferred to a vibration or to excite an electron. If it is not, it will be reflected.\n\nIts a bit like a guitar string. If you strike it at the right frequenecy it sounds a note, otherwise it does not vibrate.
575202
heat is a form of energy.
102101
If you want to look at it on the atomic level,\nyou can think of light as a photon (a packet of energy).\nThe photons can be absorbed by the electrons around the atom which will excite them into a higher energy state.  When the electron falls back down to the ground state, it gives off a photon with a specific amount of energy.\n\nhttp://www.amazingrust.com/New/beta/Experiments/background_knowledge/Spectroscopy.html
77624
In my opionion, It is more like a very tightly compacted wave, of which light is a part. When matter is released back to it original wave state it emites, heat wave, sound wave, and a full spectrum of radiation waves from micro, to light, to gamma and everything that surrounds that visible and invisible spectrum.
278108
You can not generate true "white" light with a laser.  Lasers are sources of coherent light.  This implies that they are monochromatic (single wavelength or color).  In order to generate white light, you need a broad spectrum (many wavelengths), so you can not use a laser.  However, our eyes can perceive the color white with just a combination of a few colors (red, blue, green).  So a laser system that combines a red, green and blue laser will give you the impression that it is a white laser.
998464
moving from a higher to a lower energy level releases energy, producing light, but;\nit only produces light in the visible light spectrum when it moves down to level n=2.  if it ends up at another energy level, the light released will be infared, ultraviolet, etc... depending on where it ends up.
329395
Well, first, you have to be specific about what energy.\n\nIf you are standing in a room where your body tempature is greater than the surrounding air, then you are radiating heat, which the naked eye cannot see. However, you can transfer this energy: for example, in the cold, a herd of animals will draw in close and rub against each other to share body heat and reduce exposure to the elements.\n\nThe human body does not emit light, however it does reflect it (otherwise you couldn't see someone). Your eye, obviously, can see light reflected from objects. You cannot transfer light to someone else, in the sense you're probably thinking of.
817728
Light is emitted by objects that are very hot.\nLight is emitted by objects that are at very high temperatures.
184337
You should re-ask.  Do you mean strength or heat or both?  We also produce electricity and build chemicals that store energy.  You need to define output better.
523878
The moon gets its light from the sun!  Way out in outer space, the sun produces light and heat.  The sun's energy is reflected off the surface of the moon and bounced back to the Earth.  What we see is the reflection of the sun's light on the moon.
241831
Light can be both a particle and a wave.
90843
Light consists, at least in part of photons.  Photons excite photoelectric cells.  Excitation in photoelectric cells induce electric current.  Electric current is charges and is stored in storage battery or otherwise put into electric grid for immediate use.
930423
All energy eventually ends up as heat.  It's a consequence of the second law of thermodynamics