In part 3, my hypothesis is that the hair will act as a single slit and act similarly to that of a single slit interference and create spaced out orders. Methodology Materials: Double-Slit Diffraction Grating Laser Ruler Meter stick Viewing Screen Procedure: Part 1: Double-Slit Interference Connect the laser and position the laser 1 meter away from the viewing screen. Having positioned the laser, turn it on and position the double slit in front of the light source to produce an image on the viewing screen. Choosing an order of diffraction, measure its distance from the central maximum. Then record that value and turn off the laser, and record the distance of the light source from the viewing screen.
Andrew Knapp Unit 7 Assignment 1. Refraction, Reflection, and Optics NT1310 2/18/2015 Refraction occurs when there is a change in direction of propagation of a wave due to a change in its transmission medium. Basically this is when light is bent due to the light waves passing through a substance such as water or glass. When this happens the light particles slow down or are absorbed into the material. A real life example of refraction would be when a pencil is placed halfway in a glass of water.
Determination of the pKa of Methyl Red by UV-Vis Spectroscopy February 16, 2010 (Partner:) ABSTRACT The purpose of this experiment was to obtain the pKa for an acid-base indicator. A spectrometer was used to determine the pKa of methyl red. The calibration curves were created by analyzing samples of known concentration at pH’s well above and below the pH indicator range for methyl red. Then samples of known pH were analyzed. By, solving the system of equations using linear algebra, the concentrations of the indicator and the conjugate base were determined.
Poke a pencil through one of the loops you just made. Use the pencil to suspend the strip in a small glass or container. 5. Carefully add water to the glass until it reaches the bottom of the paper strip just below the ink dot. Be sure the ink stays above the water and the paper stays in the water.
j. On/off switch: This switch on the base of the microscope turns the illuminator off and on. k. Illumination: The light source for a microscope. l. Iris diaphragm: Adjusts the amount of light that reaches the specimen. m. Condenser: Gathers and focuses light from the illuminator onto the specimen. n. Base: The base supports the microscope.
CHL 161 Laboratory Experiment 4 and 5 Molecular and Electronic Structure Ionic vs. Covalent Compounds and Water Objective: 1. The objective of the Molecular and Electronic Structure Lab was to determine the color of light each solution emits. We also had to identify unknown solutions according the color of light each solution emits. Objective: 2: The objective of the Ionic vs. Covalent Compounds was to determine the physical appearance, solubility and conductivity of compounds. We also have to determine if the compound is ionic or covalent based on our findings.
We used two methods of determining the focal length of the lenses, estimating the magnification of the convex lenses, and using the lenses to create two different types of telescope. The first way we estimated the focal lengths of the two positive lenses a & b was to form images of a bright object located a long distance away and measured the distance between the lens and the image, which is the focal length. We then recorded our estimated focal lengths in the tables. Another way to estimate the focal length was an equation we used from the lab. Using the values for lens a and lens b, we filled in the columns for image distance in the two tables.
UNIVERSITI TUNKU ABDUL RAHMAN Faculty Course Year/ Semester Session : : : : Faculty of Science Bac. of Science (Hons) Chemistry Year 3 Semester 1 201105 or May 2011 Unit Code Unit Title Lecturer Assignment : : : : UDEC3254 Spectroscopy and Chromatography II Dr. Lim Chan Kiang 2 Answer all questions 1. A mixture of steroid hormones consisting of cortisone, cortexone and corticosterone was separated using a HPLC silica column eluted with a binary mixture of acetone and hexane (20:80). (i) What is the order of elution time for the above compounds from the HPLC column? (3 marks) (ii) What is the chromatographic mechanism involved?
Snell's law (also known as the Snell–Descartes law and the law of refraction) is a formula used to describe the relationship between the angles of incidence and refraction, when referring to light or other waves passing through a boundary between two different isotropic media, such as water, glass and air. In optics, the law is used in ray tracing to compute the angles of incidence or refraction, and in experimental optics and gemology to find the refractive index of a material. The law is also satisfied in metamaterials, which allow light to be bent "backward" at a negative angle of refraction with a negative refractive index. Snells Law Although named after Dutch astronomer Willebrord Snellius (1580–1626), the law was first accurately described by the scientist Ibn Sahlat Baghdad court, when in 984 he used the law to derive lens shapes that focus light with no geometric aberrations in the manuscript On Burning Mirrors and Lenses (984). [1][2] Snell's law states that the ratio of the sines of the angles of incidence and refraction is equivalent to the ratio of phase velocities in the two media, or equivalent to the reciprocal of the ratio of the indices of refraction: with each as the angle measured from the normal of the boundary, as the velocity of light in the respective medium (SI units are meters per second, or m/s) and as the refractive index (which is unitless) of the respective medium.
Light and Geometric Optics Refraction of Light through Different Media Mr. Sampson SNC2D1-03 Date performed: September 29th, 2011 Date due: October 4th , 2011 Purpose: The purpose of this lab is to find out the angles light goes through different objects, at different angles. Hypothesis: I predict that the angles will be very different, when light is shined through the different angles. I expect this because the objects are different materials and the light will go through them in a different way. Materials: * Water * Vegetable oil * Coordinate paper * Acrylic semicircular * Ray box with single slit * Semicircular plastic dish * Dish detergent for cleaning Procedure: 1. The dish for the water was placed at the center of the coordinate paper with the flat edge along the 90° - 270° line and the 0° line intersecting the center of curvature.