From these, they are to determine the refractive index of the glass block. We thank the editors and four referees for very helpful comments. This note describes an experiment for determining the refractive index of glass. That is, blue light is bent more by glass or plastic lenses and red light is bent less. After looking to the left, you see two buttons on the wall to the right. The refractive index of a glass is a function of the wavelength of light. This book will help you understand basic terms and concepts about scientific experiments.
Some historical notes of general interest from the book, arranged by chapter. A soft tone sounds and the two halves of the wall slide apart to reveal a small room. By saima masoom ali definition of research research is an organized and systematic way of finding answers to questions. A short, very precise and clear introduction to experimental research, created by. Note its similarity to the true experiment, with the omission of the randomization component. Walumbwad, adrian chana,e a university of washington, united states b claremont graduate university, united states c west point united states military academy, united states d arizona state university, united states. The experiment is to enable the students to observe the image formed of an optical pin in the glass block and also use the data obtained to determine the refractive index of the glass block. Oiinteri41 for crystals containing oxygenoctahedron such as ndo, tao, tio, and io. Detection of liquid concentrations by optical means was already known in antiquity. Our metal activity series is mg easiest to oxidize, zn, pb, cu, ag hardest to oxidize.
If at least one of the treatment factors is qualitative, the combined analysis may appropriately include pairwise comparisons of various treatment means averaged over environments. Research is conducted in the form of an experiment where. Belle plaine family medicine showcased its newly remodeled facilities during an open house june 10. An experimental study on fear of public speaking using a. Place a glass block on a sheet of paper and draw its outline. A positive theory that fair value should be used to measure the items in the financial statements b.
Use snells law to calculate the refractive index by assuming that the refractive index of air 1 n is 1. In order to compare the ferroelectric properties of these crystals, we may use d2n3 dnonlinear optical coefficient, nrefractive index as a figure of merit of the ferroelectric properties. Draw the incident and emergent paths of the laser on the paper. A real activity series is mg strongest, zn, pb, cu, agweakest. Different gas, liquids and solids have different refractive index. This is the cause of chromatic aberration in simple lenses. The actual experiment reports will usually be longer as there is more material to cover. The question arises as to how much time people save by using search en. Pdf experimental and numerical analysis of soil motions. The controlled experiment, hypothesis testing, and the z distribution 5 chapter 5 goals understand hypothesis testing in controlled experiments understand why the null hypothesis is usually a conservative beginning understand nondirectional and directional alternative hypotheses and their advantages and disadvantages. Control is much easier to achieve in the laboratory than in the field.
Recent developments in the growth and nonlinear optical. The experiment by findley, jensen and nielson is experiment 1 in this version and the experiment by chatterji and meier is experiment 2. Students may find it helpful to formulate their hypothesis as an answer to the following question. Different glass types exhibit different dispersion curves. Pdf determination of refractive index of a liquid using. Experimental and numerical analysis of soil motions caused by free vibrations of a building model article pdf available in bulletin of the seismological society of america 906.
Physics lab report refractive index sine refraction. Faraday effect and lenz law physics 208 name section. Each participant in the experiment experienced either a static audience, an. Index of experiments described about fundamental constants. Many agronomic experiments with complete factorial treatment designs are conducted in two or more environments. The primary difference between the true experiment and quasiexperimental designs is the degree of control that the researcher has over the subjects and variables of the study. Name of experiment date of performance experiment marks teachers signature 1. Study of concentration dependence of refractive index of. Allows evaluation of causal relationships among variables while other variables are eliminated or. Despite this, aquatic research is still divided in marine and freshwater sciences. For more information on our new high power uv curing lamps, visit. Measuring the refractive index understanding standards. Research methods experimental design a set of notes.
A researcher conducts a study examining how the brain chemical serotonin is related to aggression. In this thought reach extreme values at the same composition. Depending on the type of uv lamp and output power, the uv7000 adhesive curing time will range from 20 seconds to 4 minutes or more. The purpose of experiment 3 is to further explore the fundamental principles of how. A normative theory that fair value should be used to measure the. We suggest that you experiment with your current uv lamps to find the optimum curing time for the type of joint being bonded. Research methods in which conditions are controlled so that one or more independent variables can be manipulated to test a hypothesis about a dependent variable. National 45 physics outcome 1 a scientific repo rt of. We conclude experiment, the average speed of light across the unmixed by outlining an advanced method of analysis of refractive layers, denoted c unmixed, is then eq. Competencybased education cbe experiment reference. Pdf the present experiment discusses, presumably the most basic method, for determination of refractive index of optically transparent. The ultra low viscosity of this adhesive reacts extremely well to the new higher power uv lamps on the market. Activity series lab report by alyssa kirsch on prezi. We get enhanced transmittance of more than 20 db from background reading, at a.
Determination of the refractive index of water using a concave mirror method 1. Note that this report does not represent a real experiment and thus should be used only as an example of style and form. The refractive index of glass is a function of the wavelength of light, a property known as. Refractive index is also equal to the velocity c of light of a given wavelength in empty space divided by its velocity in a substance, or v n c v. To drive this point home, i first discuss the meaning of causation and, hopefully, convince you that it is difficult to identify causality. To study the different types of centrifugal and inertia governors and demonstrate any one.
To receive full credit you must use complete sentences and explain your reasoning clearly. Determination of the refractive index of a glass block. In this experiment you will measure the index of refraction of air by comparing the. Experimental and quasiexperimental studies bruce j. Since nair is taken to be 1, in this way, the refractive index of a glass block can be calculated by. Sheldonin1861 6theexperimentalschoolinaugurated byfrancisw. Systematic because there is a definite set of procedures and steps which you will follow. Pdf determination of refractive index of optically transparent. To verify snells law and measure the refractive index of a solid diagram apparatus laser glass block protractor procedure 1. This project is focused to measure the refractive index of sugar solution which can be used in various works in laboratory and industries. In the interest of saving paper, ink and my miniscule collegestudent budget, i didnt copy and paste the introduction from experiment 2 into experiment 3 because they are identical in theory and background. A refractometer measures the extent to which light is bent i.
Example experiment report for phys 342l purdue university. Beaker used to measure rough volume of liquid unit. Lakes, rivers, estuaries and oceans are closely connected. Determination of the refractive index of a liquid using. Elementary charge oil drop experiments using the avogadro constant and the faraday constant. A simple method to determine the refractive index of glass. Refraction is a major phenomenon in the day to day life. Experimental characterization of negative refractive index. Least significant differences for combined analyses of. In earlier work 11 we studied the responses of people to small audiences in a seminarstyle setting.
Learn vocabulary, terms, and more with flashcards, games, and other study tools. Verifying the lenz law by measuring the electric current flowing through a coil created by an external magnetic field teachers guide 1. To study the forced vibration of the beam for different damping. To verify snells law and measure the refractive index of. Find the mean of the three values of refractive indices and. Research projects develop a system approach for the understanding of charge preparation, fuel injection and sprays, combustion optimization and emissions and exhaust aftertreatment in close support to complementing modeling projects. Index instructors evaluation of experiment reports s.
The controlled experiment, hypothesis testing, and the. Research is conducted in the form of an experiment where the relative usefulness of historical cost and fair value measures are considered, and it is found that better decisions are made using fair values. It turns out that n is smaller for long wavelength red light and larger for short wavelength blue light. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. A compound lens, made of a pair of thin convex glass cover enveloping a liquid water and glycerine separately in our experiment and are glued. The index of refraction is, in general, a function of the wavelength of the light. Studies of airfuel distributions, mixing and inhomogeneities, effects of spray targeting on pistons, wall. Benton county sheriff randall forsyth reported last friday that two subjects have been arrested following a lengthy investigation of multiple car wash thefts in newhall between june 2008 and march 2009 and a recent attempted theft at a shellsburg car wash. The refractive index also depends on the wavelength colour of the light ray. You approach a stainlesssteel wall, separated vertically along its middle where two halves meet. A semicircular, cylindrical, glass block,2 90 mm in diameter, is placed on a. How exact you need the volume to be measuring volume. Example experiment report for phys 342l the following report is written to help students in compiling their own reports for phys 342l class.
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