Hestia Livana Partners : Rachel Gideon‚ Joy Boake‚ Hannah Harper Various Color of Light as the Effect of Electron Emission Objective Observe the characteristic colors produced by certain metallic ions when vaporized in a flame. Identify the unknown metallic ions by means of its flame tests. Background When atoms absorb energy‚ electrons move into higher energy levels‚ and these electrons lose energy by emitting light when they return to lower energy levels. Energy levels are fixed energies
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Based on the data from the riboflavin spectrum scan‚ the maximum absorbance wavelength for this compound is 446 nm. This was the point between 390 nm and 500 nm at which the absorbance value (0.72) was the highest. A blank tube that has the components of the solution being examined except for the compound of interest is then used in combination to provide an even more accurate reading. Then‚ by using Beer’s Law‚ the molar extinction coefficient for riboflavin was able to be calculated: 14‚400 L/(moles*cm)
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The results of the experimental study found that there was a significant difference in Daphnia’s response when exposed to red light compared to white light. Thus‚ the null hypothesis was rejected and the experimental hypothesis was accepted. These findings could be due to the negative phototactic response that occurs when they are exposed to visible light that are above 600 Mn (nanometers) that are also considered the color red. This shows that Daphnia have a greater phototactic reaction to red light
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Cosmic Microwave Background Radiation The Big Bang theory predicts that the early universe was a very hot place and that as it expands‚ the gas within it cools. Thus the universe should be filled with radiation that is literally the remnant heat left over from the Big Bang‚ called the “cosmic microwave background radiation”‚ or CMB. The CMB is an almost-uniform background of radio waves that fill the universe. The CMB is‚ in effect‚ the leftover heat of the Big Bang itself - it was released when
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ABSTRACT The effect of different levels of radiation was determined using four set-ups-10kR‚ 30kR‚ 50 kR‚ and the control (no radiation). The four set-ups were observed for nine weeks and growth (in cm)‚ germination‚ and survival rate was measured. Results showed that at the right level of radiation level (10 kR)‚ radiation have a positive effect on the plant growth and has the same germination and survival rate from the control set up. The 30 kR set up and 50 kR set up are relatively smaller
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Do you love watching TV? Everybody love to watch TV‚ including children. Children spend more time to watch TV than doing anything else. Within a week they can watch TV about 170 hours. Because watch TV is not so bored like reading book. And they also can absorb many information from TV that is not derived from other media. But on the other side‚ there are many TV program that give bad influent to the children. Increasing obesity and ruining their eyes are the bad impact of watching TV for children
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Absorption of isolated chloroplasts To test absorption of isolated chloroplasts from spinach absorption readings were taken at a series of different wavelengths. Absorption Maxima of the isolated chloroplasts were observed at wavelengths of 440 and 680 with corresponding absorbance values of 0.792 and 0.589 were noted (Fig 1.). Absorption minima of the isolated chloroplasts was noted at a wavelength of 580 at an absorption of 0.291 (Fig 1.). This indicated that green light is reflected strongly
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Physics Waves Lab SL Introduction: This lab will investigate the properties of mechanical waves such as a longitudinal wave‚ focusing on the question: Does a change in the frequency of a wave result in a significant and convincing change in the speed of the wave? Hypothesis: Changing the frequency of the wave will not result in a change in speed because the wavelength will change proportionally as in theory. Student Designed Investigation Procedure/ Planning Procedure: 1. Three
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LS1120 Practical 3 ABSORPTION SPECTRA AND THE BEER-LAMBERT LAW The purpose of this practical was to measure the amount of a chemical substance present in a sample. Primarily‚ the aim of Experiment 1 was to measure the absorption spectrum of a particular coloured substance (in this case Bromophenol Blue and Methyl Orange) at varying wavelengths of light. For Experiment 2‚ the process of the experiment focuses on the substance and records its absorption levels at different concentrations. The
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Compare and contrast laser scanning confocal and multiphoton microscopy in 250-500 words. Both confocal and two-photon (multi-photon) laser imaging can generate 3D images by capturing a stack of optical sections at different focal planes. In confocal microscopy‚ a detector pinhole which rejects fluorescence from off-focus locations is used; while‚ two- photon microscopy is capable of giving 3D contrast and resolution (comparable to confocal microscopy) without the necessity for
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