Automatic Street Light Control System is a simple and powerful concept‚ which uses transistor as a switch to switch ON and OFF the street light automatically. By using this system manual works are removed. It automatically switches ON lights when the sunlight goes below the visible region of our eyes. It automatically switches OFF lights under illumination by sunlight. This is done by a sensor called Light Dependant Resistor (LDR) which senses the light actually like our eyes.
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The Northern lights‚ or Aurora Borealis‚ are one of the world’s most amazing phenomenons. The lights are the result of collisions between gaseous particles in Earth’s atmosphere with charged particles from the sun. Free electrons and protons are thrown from the sun’s atmosphere by the rotation of the sun. The charged particles are are largely deflected by the earth’s magnetic field‚ but at the north and south poles‚ the magnetic field is weaker‚ allowing some charged particles to collide with gas
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assessment criteria 5 and 6 The Photoelectric effect‚ and the Production of Light In 1887 Hertz discovered the photoelectric effect‚ where electrons were emitted from a zinc surface when illuminated with ultra-violet light. These electrons (called ‘photoelectrons’) were only emitted when the frequency of the ultra-violet light was above a certain value (called the ‘threshold frequency’). Criteria 5c Assume that ultra-violet light is falling onto a piece of zinc‚ and photoelectrons are being emitted
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A Seminar Report On “ORGANIC LIGHT EMITTING DIODE INDEX S.NO TOPIC PAGE NO 1) Introduction…………………………….……………….….………………6. 2) OLED vs LED……………………..…………………….……………..…..7 3) History………………………………………………….…………….……..8 4) Organic Light Emitting Diode……………………….……………….…….10 5) Structure of OLED………………….……………………..………………...11 6) OLED device operation and principle……........…………..………………...12 7) Working
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GLENDA MARIE GARCIA POLARIZED LIGHT LAB REPORT EXPERIMENT # 5 June 27‚ 2014 PHYS 1417 ABSTRACT Ordinary light such as that from a light bulb is a form of wave motion that consists of electrical and magnetic fields that vibrate at right angles to the direction of travel of a light beam. Light waves that vibrate in a single plane are called polarized light waves. Such waves can be produced by passing light through polarizing filters. The experiment conducted was composed of crossed
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Investigation of the effect of light intensity Equipment: * Data loga * Light sensor * Bulb * Metre ruler X3 Variables: Independent variable – distance of the light sensor from the light source (m) Dependant variable – intensity of light (lux) Control | Why it needs to be controlled? | How will you control it? | Bulb | There are different watts in different bulbs | Use the same bulb‚ but if your one does break half way through the experiment you can use another bulb with the
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Light and Dark Minerals Compare and contrast Essay. Have you ever wondered about light and dark minerals? Although they’re different from each other‚ they are alike in many ways. Dark and light minerals do have similarities like the eight elements. These two minerals helped form rocks in today’s society. Dark minerals are different from light minerals because of the colors. These minerals are Pyroxene‚ Amphibole‚ Olivine‚ Calcium Feldspar and Iron. The dark minerals form dark colored rocks
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The Power of Light A Candle light is the most primitive of lights‚ but it serves a different purpose than illuminating a room in The Glass Menagerie‚ written by Tennessee Williams. Williams uses the contrast between light and darkness to symbolize and emphasize the powerful moments that occur in the play. Although Williams uses these mechanics‚ the candle light of course has deeper meaning within the context of the story. Being the weakest of lights‚ the candle light is easily extinguished‚
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Light and Dark Between Romeo and Juliet In Shakespeare’s Romeo and Juliet‚ in the beginning of act 5 scene 2 as Romeo is attempting to leave after his wedding night‚ Juliet’s true nature is shown through the symbolism of birds and the contrast of light and dark. While Shakespeare initially uses light to portray Juliet‚ throughout the speech he uses the figurative language‚ word choice and symbolism of Romeo and Juliet’s language‚ to show a change in their character and personality. While Juliet
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society‚ especially among teenage girls‚ watching makeup YouTube videos is run-of-the-mil ordinary. These videos range from makeup tutorials to favorite product videos. Kathleen Lights‚ a famous makeup artist on YouTube recently launched a video named Best of Colourpop/ My favorite products - updated‚ which got 703‚ 571 views. Lights is an affiliate of Colourpop so she receives PR from their company‚ which is free makeup. She has business relationships with the staff at Colourpop so naturally she wants
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