Experiment on finding the Refractive Index value of Perspex using Snell’s law Aim: The aim of this experiment is to find the refractive index of Perspex, using Snell’s law. By shining a ray at a prism and drawing the incoming and out coming ray, and then drawing the normal and measuring the angles. Variables: Table 1: table of variables Identify the variable(s) How will the variable(s) be changed, measured, and/or controlled? Independent variable(s) Angle of incidence Move the box around so that the ray hits the prism at different angle. Dependent variable(s) Angle of refraction Measure the angle with a protractor.
Choose best answer. Can have multiple answers. Assume ocular is 10x. 1. The total high power magnification is 400x, the low power magnification is 10x, the low
Then I drew a semi-circle on the top of the intersection representing the flexi glass and placed the flexi glass over the semi-circle. 4. Plugged in the ray box to a power source and using the single slit barrier, I placed the light ray along the normal to ensure that the light is not bent at this point. 5. I then placed the ray box allowing the light ray travels along the 10° then marked the refracted light on the glass.
Fill refraction cell with water. 4. Direct laser pointer at Refraction cell so that the light from the laser pointer enters the refraction cell at the reference line. 5. Place a dot on the piece of paper at the point where the laser light originates from the pointer and where it leaves the refraction cell after passing through the water.
Investigating the various phenomena which occur when monochromatic light undergoes diffraction Title: Determine the wavelength of a monochromatic light source (laser). Measure the groove spacing of a CD and the diameter of powder spores using diffractive methods. Aim: The aims of this experiment are to determine the wavelength of the monochromatic light source and to determine the groove spacing of a CD and the diameter of the Lycopodium powder. Introduction: There are three parts to this experiment in the first part a diffraction grating is used to diffract light from a laser (monochromatic source of light). By measuring the angles of diffraction and by calculating the grating spacing, the wavelength of the light may be calculated.
Procedure We set up the optics track, light source and the ray table. We then aligned the flat side of the mirror with the ray of light from the light source. We rotated the ray table in increments of 10 ̊. The first set were done going clockwise. Once done we then did the same thing but going counterclockwise.
Scanning Objective Lens • Most objective lens are color-coded, including scanning objective lenses. Scanning objective lenses usually have a red band around them and provide a magnification of 4x. The purpose of this lens is to provide an initial magnification of the specimen being studied. Although the scanning lens does not provide a great deal of magnification, it is important to use this lens with every specimen to initially bring it into focus and center it within the field of view. Low Power Objective Lens • Low power objective lenses typically provide a 10x magnification and will have a yellow band around them.
This detection is carried out by photoreceptors within the human eyes. The photoreceptors consist of cones, which are responsible for colour recognition, and rods which are responsible for detecting contract between light and dark. When the electromagnetic energy hit these photoreceptors, this is relayed back to the brain which converts this energy into the images that are perceived by human being. The eyes of have many different properties and seven of them will be tested and verified in this laboratory with seven different experiments. These experiments are as follows, the convergence of gaze, accommodation of the sight, blind spot of the eye, mechanical stimulation of the photoreceptors, positive afterimage, negative afterimage and finally visualizing retinal blood vessels.
There are many useful devices that form images by refraction, such as eyeglasses, cameras, binoculars, microscopes, and telescopes. Gap loss: gap loss happens when the signal from one end of a piece of cable is transferred to another, but there is a space, breakage, or gap between them. Since fiber optics transmit data via light the light can cross this gap, but spreads out and is weakened and diffused
Thus making distance (u) the independent variable. Apparatus needed: Lamp, Object, Convex Lens, Screen, 1m Ruler Procedure: * Acquire a Convex Lens and hold it slightly away from a natural light source eg, the window and project a picture of that light source onto the wall. * Now keep amending the Convex Lens back and forth until the picture