how would da world b witout light energy (electromagnet)?
961027
Dead.\n\nThe only source for energy for life on earth is the sun, and the only way that energy gets here is light.
53124
At the speed of light... than the chloroplast from the plant turn it into energy
230711
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.
492443
It is theoretically possible, but highly impractical.  Think about the equation E=mc^2.  C is the speed of light - 186000 meters per second.  So from that equation, you can see that a tiny bit of mass is the equivalent of a huge amount of energy.  Conversely, it would take a huge amount of energy to make even a tiny amount of mass.
1018708
Light waves are electromagnetic energy, which can be transported across a medium. If it helps, light waves can be thought of as photons, massless particles that fly through space. No medium is required for transport.\n\nSound waves however are a disturbance OF the medium, as ocean waves are a disturbance of the water. Your eye and ear are very different in how they operate, one being capable of detecting electromagnetic energy, the other acoustic energy.
134682
Light is both a wave and a particle at the same time.\n\nLight is a form of energy, and depending on how you observe it, it exibits both properties of an electromagnetic wave or a particle (photon).\n\nElectromagnetic waves do not require a medium in which to propigate, they are a self propigating electric and magnetic field, allowing it to travel through a vacuum.\nEvidence of this can been seen in diffraction patterns, such as when you look at the rainbow effect on a CD.\n\nPhotons are a "quantized" amount of light.  These light partciles are absorbed or given off by atoms in something called the "photoelectric effect" (which Einstien received a nobel prize for).\nEvidence for this can be seen in things like LEDs or when you study the structure of the atom.
986651
To be honest, if I had the choice I would not take it. I think I would prefer to be me. \nIf my physics teacher was some sort of evil genius and only offered me the choice of specifying what type of light he was going to change me to I think that maybe UHF radio waves would be quite good.  90 kg worth of mass converted to energy would certainly be enough to fry my physics teacher and vapourise a significant chunk of the surroundings so that would serve him right and the EMP might destroy just about every piece of electronics on the planet and mess up the ionosphere for years but it should still have less effect on everybody else than x-rays would.
502927
Energy equals mass times the speed of light squared
275900
Thomas Edison explored this very same issue. He experimented many different components and found that a steel wire in a vacuum lasted longest.\n\nSo yes the light would work, but for a short period of time when the wire, exposed to air, would oxidize then burn up.
1054406
And just how do you propose I put a diagram on Y!A?\n\nNonetheless, electricity can be used to generate electricity, as mentioned.  Put three magnets around a rotating shaft & you get 3Φ electricity.\n\nMagnets work in compasses to help a person find direction.\n\nMagnets can be used to hold cabinet doors closed.\n\nMagnets can be used to lift things (like in a junkyard to move vehicles to a compactor), or to remotely move magnetic items (like if you can't reach your car keys, you could retrieve them with a strong enough magnet).
120867
ELECTROMAGNETIC ENERGY is ENERGY coming from the POLARIZEd motion of ELECTRONs, but i don't think LIGHT is ELECTROMAGNETic ENERGY. For me, LIGHT is a FORM of QUANTUM ENERGY.
639238
e=mc^2 \n(energy equals mass times the speed of light squared).
1018446
I know Einstein came up with it and it deals with energy.\n\nEnergy(E) = Mass(m) * Speed of Light(c2)
639418
Light pushes electrons outs of the atoms in the cell making electricity
508002
electricty is form of energy which is created by flow of positive charges(conventional assumption).but actually it is due to the flow ofelectrons inthe direction opposite to the flow of electricity.actually electrons do not travel with that speeed the electric field does the necessary.\n\nbut u have mentioned that matter particles cannot atttain the velocity comparable to that of light.\ni think its not correct\naccording to einstien's theory of relativity\nno particle in this universe is able to attain the velocity greater than that of light even same velocity for some.\nbut if the particle travels with a velocity comparable to that of light then the mass changes accordingly\nm=mo/sqrt(1-v^2/c^2)\nwhere mo is the rest mass of particle\nv is velocity of particle\nc is the velocity of light\nm is the mass of particle at velocity v
589672
Good answer Azreal! Scientists in Australia have actually transported light matter across the laboratory in the last year though....hey its a start!
604389
Light doesn't have a rest mass, that is an inherent mass that it would have it it were at rest relative to you, but it does have a mass equivalence due to its energy. \n\nE=MC^2 gives the relationship between mass and energy, so you can rearrange this to M=E/C^2 to find the mass equivalence of a given amount of light.  The energy of light can be calculated a number of ways, and then this number can be plugged into the mass-energy equation.  Needless to say, it takes a whole lot of light to add up to a significant amount of mass.\n\nEdit:  Sorry, Mathematician, you're incorrect.  Light does have mass and it can be calculated using the mass energy equivalence.  Your argument is basically circular since you're using the definition of light not having a *rest*\n mass to say that it has no momentum, and the statement that it has no momentum to claim that it therefore has no mass.  You're right in that it has no rest mass, but that's not the only kind of mass there is.  If you've ever seen a radiometer work you've seen direct evidence of the momentum of light.