Why does the efficiency of a solar cell increase with light intensity?
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solar cell efficiency should not depend on light intensity unless there is change in recombination kinetics. generally with the intensities available the efficiency should remain constant.
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Used for measuring light intesity. It has a photo-voltaic cell(s) that produce electrity when exposed to light. The amount of electricity is measured to find the intensity of light.
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By capturing the light and storing it.\nFor example capturing the sunlight inside the glass chambers filled with special metal foils that will get heated and then can be used later in solar energy.\nSo, that we can use that energy to heat, light, cook, and many other things.
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If you want complete info this is the site, http://science.howstuffworks.com/solar-cell.htm
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when light is thrown upon the atoms..it provides energy..which is taken up by the electrons and they escpae from the surface of the metal..called as photons.
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A photodiode will allow current to pass proportional the amount of light incident upon it.
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The idea is to provide more solar intensity for a longer time on the solar cells thus yield more watt hours of energy than a  fixed array. (You generate power earlier and later in the day than a fixed array). It costs more to install than a fixed array and you will need to do your homework to determine how long it will take for payback (Cost of equipment vs KWH increase). Generally in the very long run it is worth installing a solar tracker if you have the bucks.\n\nVisit www.homepower.com to learn more.
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Photovoltaic cells convert light into electricity... They are in essense a type of diode that is the exact opposite of an LED (light emitting diode) which converts electricity into light.
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Intensity refers to the number of photons.  Concentration is the number photons/unit area, so what the smarties who've answered this question mean is, no, you can't increase the number of photons, you're just making them bounce off something (like a ball would), they're not multiplying in number.  Instead, you're increasing the number of photons in the area, making it moer concentrated.  In fact, do a thought experiment with a number of balls bouncing off a semicircle of walls.  They'd all hit close to the same place, but there'd still be the same number.
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Energy level is much more significant to atomic size.
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solar cells produce electricity through a process known as photoelectricity.Photoelectricity means a process in which light is shone (fall on) photocells which bring about the release of electrons.i.e.production of electricity .
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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.
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According to scientists, current theory suggests that "fusion" of the element hydrogen into the element helium releases photons.  When the heavier element is made, photons are released from the reactions.  Photons are sometimes described as wavicles, because they can demonstrate the behavior of waves and particles, but neither a wave nor a particle can completely describe a photon.  A photon has a frequency and is an electromagnetic emission.  Photons from the sun come in a huge range of frequencies.  Most useful to humans are the photons that heat things and cause us to see things (light).  \n\nPhotons can be directed to silicon semiconductors in a solar cell.  When the photons collide with the extra electron in the outer shell of an element in the silicon, the electron moves through an electromotive force, causing electric current to flow.  In heating applications, the photons impart kinetic energy to the object they encounter, increasing the net kinetic energy of the body therefore increasing its temperature.  \n\nIf you set out a gallon of "solar tea," the sun will heat the liquid and brew the tea for you.\n\nSome of the most interesting solar energy is released in solar sun-spot activity.  These emissions can interact with our telecommunications systems and power grids with unpredictable and sometimes disasterous results.\n\nTo date, humans harness solar energy by heating things or placing solar cells out to make electric power.  The practical applications include solar heating pool water, solar heating homes, and charging lead-acid batteries for power.
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We can do a lot better than nature.\n\nOur best solar cells can exceed 20% efficiency while photosynthesis is only about 1% efficient.\n\nWhile we might be able to mimic it the low efficiency would make it seem like a waste of time.
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Currently, solar cells are only moderately efficient. Solar panels must be installed in large, unshaded areas.\n\nOther solar facilities that convert water to steam to generate power require acres of land for mirrors to focus the sun on the generation point.\n\nAll solar facilites will alter the environment around by raising the temperature in the air above them.  In the case of solar panels, they can be installed on roofs but steam facilities will block most of the sunlight from reaching the ground, altering the natural environment under the mirror field.
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It absorbs light energy from the sun.
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That happens because of the built-in power saving feature which reduces the brightness when the computer is running on battery power.  Usually you can increase the brightness by pressing the <Fn> key and the key with the picture of the 'sun and up-arrow' for brightness increase control.  Check the manual if you are unsure.