certain gases in the atmosphere trap energy from the sun. * Earth receive most of it’s energy‚ called radiation‚ from the Sun sun earth Atmosphere * The Earth’s surface absorbs the solar energy and release it back to the atmosphere as infrared(IR)radiation‚ some of which goes back to space. * IR radiations emitted by the Earth is absorbed by gases in the atmosphere that re-emit the energy as the heat back towards the Earth’s surface. The Causes of Green House Effect *
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2.9 Erbium Doped Fiber Laser The EDFLs can operate in several wave-length regions‚ ranging from visible to far infrared. The 1.55 region has attracted the most attention because it coincides with the low-loss region of silica fibers used for optical-communications [14]. The erbium absorption line that best matches with available high power pump diodes is in the 980 regime. At this wave-length‚ the absorption cross section of erbium is so low that an excessive amount of fiber would be required for
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among other things. By looking at the shape of the spectrum of light emitted by a star‚ we can tell something about its average surface temperature. i) If we observe a star’s spectrum and find that the peak power occurs at the border between red and infrared light‚ what is the approximate surface temperature of the star? (in degrees C) The temperature will be ~4000K which would be about 3276 degrees Celcius. ii) If we observe a stars spectrum and find that the peak power occurs at the border between
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Then some of the energy is radiated back into space‚ by the Earth‚ in the form of infrared waves. However during this process‚ some of the outgoing infrared radiation is trapped by the Earth’s atmosphere and warms it; which in return keeps the temperature at a livable and somewhat constant level. However‚ the atmospheric layer is now being thickened by the harmful pollution and because of that more of the infrared waves are being trapped and are now warming more worldwide. Throughout the documentary
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YHCX5070 Vacuum Sweeper Truck adopts pure suction airflow dry type operations‚ and it is especially developed for urban roads conditions. This model sweeping width is 2.4m to 2.8m‚ with 5 m3 waste hopper‚ auxiliary suction pipe(6-10m). YHCX5070 Vacuum Sweeper Truck adopts pure suction airflow dry type operations‚ and it is especially developed for urban roads conditions. This model sweeping width is 2.4m to 2.8m‚ with 5 m3 waste hopper‚ auxiliary suction pipe(6-10m) and high efficient spray dust
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0 PANJAB UNIVERSITY CHANDIGARH- 160 014 (INDIA) (Estted. under the Panjab University Act VII of 1947-enacted by the Govt. of India) FACULTY OF SCIENCE SYLLABI FOR M.Sc. (TWO YEAR COURSE ) IN CHEMISTRY 1st & 2nd YEAR( Semester System) EXAMINATIONS 2013-2014 --:O:-- 1 OUTLINES OF TESTS‚ SYLLABI AND COURSES OF READING FOR M.Sc. FIRST YEAR (SEMESTER-I) EXAMINATION OF 2013 OBJECTIVE OF THE COURSE To teach the fundamental concepts of Chemistry and their applications. The syllabus pertaining
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List of Chemistry Terms used in daily life α (alpha)‚ β (beta) α- (β-‚ γ-) ray spectrometer α-addition (alpha-addition) α-cleavage (alpha-cleavage) α-decay (alpha-decay) α-effect α-elimination α-expulsion in photochemistry α-oxo carbenes α-particle (alpha-particle) ’A’ value -factorquantity ab initio quantum mechanical methods abatement in atmospheric chemistry abeo- abiological abiotic abiotic transformation absolute activation analysis absolute activity‚ quantity absolute
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Greenhouse Effect When one starts a car or burns wood‚ the last thought on their mind is the consequences to these actions. Unfortunately‚ the daily dangers to earth are not widely know. Due to the constant change of society‚ this planet must cope with various problems. One of the most important ecological structures is the ozone layer. The same shield that protects us from the sun ’s deadly radiation‚ can also act as a blanket engulfing us in heat. This situation is know as the greenhouse effect
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Emission Spectroscopy The purpose of this lab was to see that when elements are heated‚ they may enter and excited state. We proved this by doing a flame test. During Part A‚ we used a spectroscope where all of the colors are arranged for you; whereas in Part B‚ we could see and make the colors ourselves and get a more accurate reading of the flames. We had specific elements we were told to put on the wire loop‚ and when we did that we saw different color flames come out of the Bunsen burner. That
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David Kennedy CHE 235 Lab 10/30/14 Scale-up Synthesis and Characterization of Butyl 2-Cyano-3-(3‚5-dichloro-phenyl)-2-propenoate‚ TSE Project #131 Introduction: This report describes the steps taken to create the scale-up of targeted trisubstituted ethylene‚ Butyl 2-Cyano-3-(3‚5-dichloro-phenyl)-2-propenoate compound (#131)‚ and also the characterization methods deployed to the results. This report serves as a critical step in the overall objective of the project; the synthesis of the copolymer
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