can eletric be trigger by something else instead of light?
964532
Sure, you can make a switch that is activated by almost anything including motion, moisture, sound, temperature, etc....
481267
Yep - those are called phosphenes. Pressure can generate them as well as low-frequency electrical stimuli.
157911
use a blacK light and see what happens
217437
Not in the same way that light reflects. This is an important topic in X-Ray telescopes. See below!
320202
Light has a dual nature. Or, better yet, it has a nature that depends on the observer.  The fantastic results of light experiments are fueling debates even now, half a century after quantum physics was born. I suggest you watch a movie called "What the bleep! do we know?  Or read books by Fred Alan Wolfe.
369369
According to Maxwell's laws, one type of field can induce the other and vice versa. This makes electromagnetic waves possible.
169514
nahhh   it not give u that helthy green glow.     all electonics give off some form of radiation.    but   smaller  eletronics  do not give off alot that can be dangerus
196341
I don't think you can... A Laser Beam is just an intense form of light created by the stimulated emission of radiation (hence Light Amplification by Stimulated Emission of Radiation L.A.S.E.R).\n\nElectricity is the movement of electrons through a physical circuit, so can't see how it can be done via light.\n\nHowever obviously Lasers are used in many applications (telecoms, house hold stereos, CD Players etc)... the light is pulsed at a very high speed and these pulses are decoded into an electrical signal.\n\nHope that helps.
353533
If you could find a transition between an inverted state and a ground state of 1 joule, you could probably make a laser of that frequency. At this point, hard gamma rays are the limit we have done.
61894
I know this as light mill or photon mill. There is a vacuum inside. The vanes are black on one side and metallic on the other side, the metallic side reflecting photons while the black side will absorb it. The pulse exchanged is twice as high on the metallic side of the vanes as on the black side, causing the device to set in motion.
181250
The light will be on/off
21499
If you were able to create a device that created a strong enough gravity field to suck in light, it would have the power to suck you in as well.\n\nSo, THEORETICALLY, it could be possible to construct such a device, but turning it on would be fatal.
66757
"Can light be bent by electromagnetic (EM) fields? The short answer is\nno, “but” with an explanation.\n\nEM fields bend the path of moving particles such as in the Solar Wind,\nor simply in a TV tube which uses EM fields to deflect (bend) electron\npaths.\n\nSince light is both a wave and a particle at the same time, you might\nthink that this would cause light to be bent if only you had a strong\nenough field.\n\nAfter all, light is bent by gravity, so what’s the difference?\n\nThe reason EM fields can bend the path of many particles is because\nthose particles are carrying an electrical charge – the EM field is\nactually affecting the charge associated with the particle.\n\nPhotons (light) have spin (1) but do not have an electrical charge so\nthey aren’t affected by even very strong magnetic fields." to read more click on the link below \nhttp://answers.google.com/answers/threadview?id=430345\nall credits to siliconsamurai-ga at GAnswers\n\nResources dug up by me - \nhttp://www.windows.ucar.edu/tour/link=/kids_space/qphy_grav.html\nhttp://www.nobeliefs.com/light.htm
448134
It work off of Einstein's photoelectric effect. Light is an electromagetic wave propagating through space, but due to Quantum Mechanics it can also be viewed as particles. The energy of these particles, called photons, is dependent upon the frequency of the light. The higher the frequency the higher the energy. If the frequency and thus the energy of a photon is high enough it can knock an electron out of its atomic orbital. \n  Now the problem is that one can not predict in which direction the electron is going to travel, however there are special transitionary elements between the metals and non metals called semiconductors. These semiconductors are divided into two classes p-type and n-type. Now if one places a film of n-type semiconductor against a film of p-type semiconductor they produce a diode which allows electric current to only flow in one direction from the n-type side to the p-type side. So only the electrons that are knocked from the n-type side to the p-type side are compelled to stay put, but as more and more electrons are knocked over to the p-type side a a voltage potential starts to develope.
317868
well for my physics project for the boards i made a photoelectronic burglar alarm- at the heart of this was an LDR( Light Dependent Resistor) when the beam of light is obstructed (think laser in the movies-lol) the LDR resistance rises and the circuit inside is set into oscillation and the alarm sounds- other good projects would be a rain alarm, a rectifier, an electroscope,..... the possiblities are endless- i suppose you could do anything involving electric circuits since thats what the cbse calss 12 physics text covers most- i doubt ud want to do anything on ray or wave optics
979447
Let's see:\nThe triboelectric effect is only related to friction because they both involve adhesion. However, the effect is greatly enhanced by rubbing the materials together, as they touch and separate many times to create an electric charge.\n\nSo, yes.
1135911
The photoelectric effect is the emission of electrons from matter upon the absorption of electromagnetic radiation, such as ultraviolet radiation or x-rays. An older term for the photoelectric effect was the Hertz effect, though this phrase has fallen out of current use.