Submit your completed lab report to the Lab: Photosynthesis Lab assignment link for grading. For information on how this assignment will be graded‚ please visit the Course Information sectionChlorophyll and Accessory Pigments A pigment is any substance that absorbs light. The color we see comes from the wavelengths of light that reflect. Chlorophyll‚ the green pigment common to all photosynthetic cells‚ absorbs all wavelengths of visible light except green. The green reflects back to our eyes
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health. They have physical damages and psychological damages. Cell phones are working with signal emission which causes physical damages believed to have various effects on people’s health. To begin with‚ cell phones are emitting radiation‚ electromagnetic wave‚ which is threatening people’s health. Firstly‚ radiation causes to die of brain cells which are not renewable. The die of brain cells may cause amnesia and because of not being renewable it cause early aging. Moreover‚ if cell phones are
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A parabolic antenna for Erdfunkstelle Raisting‚ based in Raisting‚ Bavaria‚ Germany. To direct microwaves in narrow beams for point-to-point communication links or radiolocation (radar)‚ a parabolic antenna is usually used. This is an antenna that uses a parabolic reflector to direct the microwaves. To achieve narrow beamwidths‚ the reflector must be much larger than the wavelength of the radio waves. The relatively short wavelength of microwaves allows reasonably sized dishes to exhibit the desired
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The Absorption Spectrum of Cobalt(II) Chloride Thang Dinh Lab partner: Alex Yang CHM 151 – 102 11/17/2014 Introduction: Many compounds absorb a certain spectrum of visible light. Since Beer’s Law describe the relationship between molar absorptivity and concentration‚ one could use his equation A = kc to find the unknown concentration by the known absorptivity. The graph of absorption spectrum is represented by a linear regression. From the graph‚ one could deduct that as the concentration decreases
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indigo‚ violet). If I tell you that sunlight passed through a prism will separate into colors by bending the red light the least‚ tell me what color of the rainbow is the most energetic color. Ans: Violet is the most energetic color on the spectrum because it has a shortest wavelength‚ highest frequency and greatest ability to bend after passing through the prism. 3. When the copper solution was heated in the flame‚ you saw a bluish green color. Explain how you might experimentally show
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photoelectric effect? The photoelectric effect is when a clean metal surface emits electrons after light‚ especially ultraviolet‚ has been shone on at it. This happens because of a process called photoelectric emission whereby a single photon package of electromagnetic energy‚ called a quantum‚ is absorbed by metal surfaces. This energy is then transferred to one single electron which can then be released by the metal and that released electron is known as a photoelectron. The effect was first absorbed by German
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the speed of gamma rays‚ when both speeds are measured in a vacuum? 19. Which color of visible light has the shortest wavelength? 20. How are the frequency and wavelength of light related? (what equation(s))? 21. What is the wavelength of an electromagnetic wave that travels at 3× 108 m/s and has a frequency of 80 MHz? (1 MHz= 1‚000‚000 Hz)? 22. Emission of light from an atom occurs when an electron does what? 23. As changes in energy levels of electrons increase‚ the frequencies of atomic line
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Practical 3 Absorption Spectra and the Beer-Lambert Law INTRODUCTION Electromagnetic radiation can be described in terms of frequency (V) and wavelength (λ). Absorbance is the capacity of a substance to absorb radiation and transmittance (the fraction radiation at a specified wavelength that passes through a sample) is physical properties that all molecules have. The purpose of experiment one was to find the maximum absorbance (λmax) occurred for both bromophenol blue and methyl orange by
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is greater than others. And we frequently see that cancer cells will "take more hits" and die if irradiated than many kinds of "regular" cells will. Radiation (either electromagnetic or particulate) causes ionization in tissue when it is of sufficient energy. A microwave oven will not cause this‚ but higher energy electromagnetic waves will cause it. So will particulate radiation. The chemical bonds that hold DNA together can be broken by ionizing radiation‚ and this kind of damage is difficult
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hertzian dipole. 3. Define antenna gain. 4. What are the two types of radiation pattern? 5. State reciprocity principle. 6. Define antenna temperature. PART – B 1. Derive the expression for calculation of electromagnetic field due to an alternating current element. 2. Explain how the solutions to wave equations are arrived? 3. (i)Derive the relationship between directivity & effective aperture. (ii)State and prove reciprocity principle with
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