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. The goal of this experiment was to measure the given amounts of a given chemical substance that was present in a given sample of Methyl Orange and in blood. We measured the optical density at wavelengths 400 to 700 in intervals of 20 mu. For Experiment 2‚ the process of the experiment focuses on the substance and records its absorption levels
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photocurrent enhancement factor below unity‚ in the entire range of wavelength above 500 nm. Now this become important observation because if there is small reduction of photocurrent in this range would be compensated near Si band gap wavelength due to light trapping. As seen enhancement is more for large size particles as wavelength increases‚ i.e. close to the Si band gap. Also‚ smaller size particles shows the enhancement over the wavelength of 500nm‚ as in case of 12 nm thick silver
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Yellow and Unknown substance two is Blue. They gave off the same hues as sodium and potassium. 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. Spectrum Line Hydrogen Helium Sodium Neon Mercury 1 Violet/blue‚ 410 nm Blue‚ 445 nm Dark yellow‚ 580 nm Violet/blue‚ 420 nm Blue/violet‚ 430 nm 2 Blue‚ 440 nm Green
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Before proceeding to test the next solution‚ we must first clean the cuvette‚ using similar steps earlier. First‚ we rinse with water‚ then with the solution‚ and then we fill it up and test. We tested for the wavelength standard 5 at which there was maximum absorption. At this wavelength‚ we tested the absorbance of all the standards. Table 1: Volumes and Concentrations of Standards and Analysis Standard in ml | | | 0.002M FeCl3 | 0.2M KSCN | 0.1 M HCl | 0 | 5 | 5 | 1 | 5 |
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theory that states that the human visual system interprets information about color by processing signals from cones and rods in an antagonistic manner. The three types of cones (L for long‚ M for medium and S for short) have some overlap in the wavelengths of light to which they respond‚ so it is more efficient for the visual system to record differences between the responses of cones‚ rather than each type of cone’s individual response. The opponent color theory suggests that there are three opponent
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Lab reflection: Light reacts to different density in different ways. An example when it goes through a low density medium to a high density medium the angle of refraction decreases. With all the test done the angles of incident and reflection stayed the same. This is because with light what angle it approaches at is the angle the light will reflect back at. Also the angle of refraction depended on what the angle of incident and refraction were‚refraction is a dependent variable being the reason
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results in a population inversion. Label the arrow P. (1) IB Questionbank Physics 1 (iii) Draw an arrow on the diagram to indicate the transition that results in a pulse of laser light. Label the arrow L. (1) (iv) Deduce that the wavelength of the emitted laser light is 690 nm. ........................................................................................................................... ..................................................................................
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▪ a sensor is placed on a thin part of the patient ’s body – Fingertip – Earlobe Light of two wavelengths is passed through the patient to a photo detector changing absorbance at each of the wavelengths is measured‚ allowing determination of the absorbance ’s due to the pulsing arterial blood alone W ho m ade it? ▪ Made in 1935 ▪ Karl Matthes (German physician 1905–1962) ▪ the first 2-wavelength ear O2 saturation meter with red and green filters W ho w
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record (on a piece of paper) the three different angles of refraction with its corresponding laser wavelengths on a data
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To determine the maximum wavelength of potassium permanganate. To plot the calibration curve of potassium permanganate. To determine the concentration of an unknown solution of potassium permanganate. INTRODUCTION: UV Spectrophotometer has 4 main components which is the UV light source‚ the sample‚ detector and the processor/recorder. Spectrophotometry is a technique that uses the absorbance of light by an analyte (the substance to be analyzed) at a certain wavelength to determine the analyte
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