The following is a project made by anonymous: INTRODUCTION The general purpose photoconductive cell is also known as LDR – light dependent resistor. It is a type of semiconductor and its conductivity changes with proportional change in the intensity of light. There are two common types of materials used to manufacture the photoconductive cells. They are Cadmium Sulphide (CdS) and Cadmium Selenide (CdSe). Extrinsic devices have impurities added‚ which have a ground state energy closer to the conduction
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Consumption of Typical Household Appliances VS VS * 60W fluorescent light bulb - 60W * 100W Incandescent light bulb - 100W Components of fluorescent vs incandescent bulbs The incandescent bulb is filled with argon to reduce evaporation and a filament of tungsten is wired inside the bulb. Electric current is made to pass through this filament which is connected to two contact wires and a conductor. The base of the bulb has a stem or glass mount anchored to it which allows for the smooth
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interference but are affected by devices oscillating in the same frequency band. Aim To test if - a TV; a microwave oven in use; a mobile phone making a phone call; a TV remote control; water surrounding the aerial; a thin-metal box; an incandescent light bulb; a fluorescent light bulb – causes interference with AM and FM radio reception. Hypothesis I think that a TV will affect AM reception‚ but not FM reception‚ because TV’s will give off electrical pulses which will interfere with AM radio‚ but not FM. I
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energy-efficient lights. * Light Fixtures * Light fixtures are the devices that hold the light bulbs you use * In order to have a light in your house you have to have a light fixture to hold it. * Since there are many different types of light bulbs there must be different light fixtures * I.e.‚ fluorescent‚ LED‚ and your basic incandescent‚ etc. * Light Bulbs * Light bulbs are what give you that wonderful emission of light. * Light bulbs vary from
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Problem Solving Thomas Edison is one of the greatest inventors of all time‚ creating over a thousand patents for different inventions and creations within his lifespan. Thomas Edison never stopped working‚ and improving on the ideas that came from his previous generations and even himself.Edison’s inventions changed the face of society forever ‚ improving the lives of millions and improving whole communities with his ideas and creations. This is evidently seen not only in the social aspects of a
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countries have eliminated incandescent to promote LED lighting plan‚ traditional lighting has been phasing out. As early as February 2007‚ Australia decided to stop using ordinary incandescent lamp in 2010‚ replace them with LED lighting products‚ Australia has become the world’s first national plans to ban the use of traditional incandescent. April 25‚ 2007‚ Canada’s Minister of Natural Resources Gary Lunn announced Canada banned the sale of incandescent light in 2012‚ becoming the second
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frequency and energy of certain frequencies of light. PROCEDURE Part 1: White light a.) Starting with the incandescent light source‚ I took a spectroscope and aimed it toward the center of the light. b.) Observe the spectrum created. c.) I then‚ repeated the same process with the light coming from the fluorescent light source. Part 2: Gas Tubes a.) I then moved to the gas tubes‚ starting with Helium. I placed myself at in front of the light tube & aimed the spectroscope for the center
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remembering to turn out the lights when leaving a room. Keeping light fixtures clean also helps save energy. In fact‚ a heavy coat of dust on a light bulb can block up to half of the light emitted. Furthermore‚ the best way for an individual to reduce the cost of lighting in their home is to switch from incandescent light bulbs to compact fluorescent light bulbs. When an incandescent light bulb is turned on‚ only ten percent of the electricity used is turned into light. The other ninety percent
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than 4 billion light-bulb-requiring fixtures and appliances in homes and workplaces throughout the U.S.‚ Of course all those light bulbs need a huge amount of electricity to work properly.” (Light bulbs). Topic Revelation Statement: Today I will inform you about light bulbs and explain which light bulbs are good for the environment. Significant Statement: Light bulbs are everywhere so they impact our lives in every way possible‚ according to an article in 2007 about light bulbs states: “15% of
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of the visual environment - one is a usually furnished room with surfaces reflecting light to a greater or lesser extent ‚ this is a basically passive component- and - the other is light‚ which (as an active component) makes the room visible. The surfaces of the interior can be characterized by their reflectance‚ while the use of light can be described by the illuminance of the surfaces. LIGHT AND ITS QUALITY Light is the visible part of the electromagnetic spectrum between the wavelengths of l = 380780
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