• Historical Milestones Development of Light Theory • • 2. Historical Development Isaac Newton – Particle Theory & Prism Christiaan Huygens – Wave Theory Thomas Young – Double-Slit Experiment James Maxwell – Electromagnetic Theory Heinrich Hertz – Radiowaves & Wireless Experiment William Roentgen – X-rays Max Planck – Radiation Theory Albert Einstein – Photo Model • 3. Isaac Newton (1642-1727) Particle Model of Light (1671) Light rays is comprised of a stream of massless particles
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Abstract The process of photosynthesis can be summarized as the photoautotroph consumption of carbon compounds as food and release of oxygen compounds as waste. The methods to measure the rate of photosynthesis are various. One method utilizes CO2 sensors to measure photoautotrophs CO2 intake under various luminescent environments. An elementary method utilizes H2O and NaHCO3 (Sodium Bicarbonate) for submersion of deoxygenized photoautotroph specimens to measure the release rate of oxygen compounds
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to investigate the effects of light and gravity on the growth of sunflower seeds. Background Info: Tropism is directional movement in response to a directional stimulus eg light or gravity. Plants are not able to relocate if they happen to start growing where conditions are nor perfect but they can alter their growth towards more favorable conditions. Plants respond to light (phototropism) where the stems grow towards the light and the roots grow away from the light. They also respond to
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Effects of Activators and Ethanol on Fermentation Rates In this lab we examined how the rate of fermentation is influenced by the type of substrate‚ and activators and inhibitors. We used four fermentation tubes in which we separately combined yeast with MgSO4‚ pyruvate‚ ethanol‚ and glucose. At five minute intervals we recorded the volume of gas produced in each fermentation tube. Our results are displayed in the graph. Our results supported the prediction that pyruvate is an activator
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AP English Literature 11 April 2012 Introduction Light Pollution Imagine. You’ve just reached home after a long day at work. You take off your shoes‚ place them neatly against the wall‚ change into loungewear and sink into the couch. Your eyes are weary so you dim the lights and turn on the television. Time passes by and you remain unmoved . Your skin seems attached to the fabric of the couch‚ the TV is low‚ creating a soft rumble to sleep to‚ accompanied by a faint glow in the darkening
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THE NATURE OF LIGHT Until the time of Isaac Newton (1642–1727)‚ most scientists thought that light consisted of streams of particles (called corpuscles) emitted by light sources. Galileo and others tried (unsuccessfully) to measure the speed of light. Around 1665‚ evidence of wave properties of light began to be discovered. By the early 19th century‚ evidence that light is a wave had grown very persuasive. In 1873‚ James Clerk Maxwell predicted the existence of electromagnetic waves and calculated
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Interactions of light and matter Young was able to explain this result as a wave-interference phenomenon – the double-slit interference pattern demonstrates the wave-like nature of light. Free download and print from www.itute.com ©Copyright 2009 itute.com Explaining the interference pattern using the wave model Light has been described both as a particle and as a wave. Isaac Newton (~1665) made up a particle model of light to explain many of the known behaviours of light at that time
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Photosynthesis and Respiration Unit2 – IP 1. A) Photosynthesis space is a process in which the energy from light is used to produce carbohydrates. Aside from using light energy‚ photosynthesis includes carbon the oxide and water. A1) In order to generate energy aerobic respiration requires oxygen‚ although fats and proteins and carbohydrates can be consumed and processed as reactant‚ is the usual method of breaking down in glycolysis and usually requires the pyruvate to enter the mitochondrion
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Part Two (Spectroscopy): Create and complete a data table for Part Two of the lab. It should include the name of the element‚ the colors‚ and the wavelength values of the observed lines. Describe the line spectrum of the star. Give the color and wavelength value of the five brightest lines in the spectrum. Line in star spectrum Color Wavelength 1 violet 405nm 2 violet 410nm 3 Violet/blue 420nm 4 blue 440nm 5 blue 445nm 6 green 500nm 7 Green/yellow 550nm 8 Green/yellow 560nm 9 yellow
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Lab Report #1 Photosynthesis Lab Report: The Effects of Varying Concentrations of CO2 on the rate of Photosynthesis in Spinach Leaves Introduction Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct. The purpose of this experiment is to see how different concentrations of carbon
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