photons emitted at particular wavelengths with particularly bright lines. Photons are emitted when excited electrons move to higher energy levels and then releases energy to return to the ground state. Since there are different wavelengths of photons depending on the energy released‚ one can utilize information on the emission spectrum to predict what shells the electrons were at before returning to their ground state. An absorption spectrum indicates the wavelengths at which photons were absorbed
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that the three different “particles” were categorized by their response the different wavelengths of light that hit the retina. Today‚ we know that the “particles” that Young and Helmholtz were discussing are the photoreceptors called cones. Each cone contains a specific photopigment that has a specific spectral sensitivity. There are S-cones‚ M-cones‚ and L-cones‚ whose names account for the type of wavelengths they are most
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November 14‚ 2012 Aim: To see how chlorophyll pigments absorb electromagnetic radiation at different wavelengths‚ with the use of a spectrophotometer to vary the wavelength of incident light‚ and then plot an absorption spectrum. Hypothesis: The chlorophyll pigments of the spinach leaf’s chlorophyll extract will absorb more electromagnetic radiation at wavelengths which correspond to the wavelengths of colors other than green‚ as chlorophyll is green and it will reflect green light. Collection
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Maria Ruiz Feb.7‚ 2012 Bio. Report Problem: Dows light intensity and wavelength affect Photosynthesis? 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. It produces sugar and other organic compounds such as lipids and proteins. The sugars are then used to provide
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All green parts of a plant have chloroplasts. However‚ the leaves are the major site of photosynthesis for most plants. There are about half a million chloroplasts per square millimeter of leaf surface. The color of a leaf comes from chlorophyll‚ the green pigment in the chloroplasts. Chlorophyll plays an important role in the absorption of light energy during photosynthesis. Chloroplasts are found mainly in mesophyll cells forming the tissues in the interior of the leaf. O2 exits and CO2 enters
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process for algae and plants. The photosynthesis process rate varies from different wavelengths and intensities of light. This lab will evaluate the optimal wavelengths and degrees of intensity during photosynthesis when chloroplast is exposed to light. The mixtures of DCPIP with water‚ PO4 buffer‚ and chloroplast will be prepared in a number of cuvettes. The cuvettes were tested individually at different wavelengths and intensities to find the optimal rate of photosynthesis by using a spectrophotometer
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wavelength Percentage concentration (methanol: water) Peak H value (height equivalent to a theoretical plate) (mm) 230nm 80:20 Phenol 0.0373 Benzophenone 0.0196 Naphthalene 0.0164 235nm 80:20 Phenol 0.0327 Benzophenone 0.0203 Naphthalene 0.0147 260nm 80:20 Phenol 0.0318 Benzophenone 0.0202 Naphthalene 0.0146 Figure 11: table for the height equivalent of the theoretical plates. It can be observed that the H values or height equivalent to a theoretical plate for phenol at the three wavelengths
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is obtained by measuring the absorbance of a sample of the beverage at different wavelengths using a spectrophotometer. This spectrum can then be related to the color of the beverage. In the second part‚ a calibration curve is prepared by measuring the absorbance of different standard concentrations of grape soda at a single wavelength. The absorbance of the unknown solution can then be measured at the same wavelength and compared to the calibration curve to determine its concentration. Any waste
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Newton’s Laws of Motion and Gravity Define mass‚ weight‚ force‚ and acceleration. Mass – A measure of the total amount of material in a body‚ defined either by the inertial properties of the body or by its gravitational influence on other bodies. It is proportional to‚ but not the same as‚ its mass Force – A quantitative description of the interaction between two physical bodies‚ such as an object and its environment. Force is proportional to acceleration. Acceleration – A vector quantity that
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Optical Fiber Communication Course Code-MCS-616 1. Draw a diagram to approaches of optical communication. 2. Draw a block diagram of Light wave application areas. 3. Why do we use fiber computing? State the characteristics of optical fiber communication. Why we Use Optics for Computing? One of the theoretical limits on how fast a computer can function is given by Einstein’s principle that “signal cannot propagate
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