Preview

Laboratory Lab Report Physics

Good Essays
Open Document
Open Document
716 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Laboratory Lab Report Physics
Physics Lab Report Physics Lab Report

Title : Geometrical Optic
Name : Muhammad Syakir Farhan b. Sebery
Group : A
Date : 20 June 2013
Matrix no : CPM 17/12C
Lecturer’s name : Mr. Zikri

Introduction

An optical lens is made of transparent material such as glass or clear plastic. One or both surface usually has a spherical curve. There are two types of lenses, converging and diverging lens. A converging lens is called a convex lens. It is thicker at the centre than at the edges. A diverging lens is called a concave lens. It is thinner at the centre than at the edges.

For a convex lens, light rays parallel and close to the principal axis are refracted inwards and converge to a focal point, F after passing through the lens. For a concave lens, light rays parallel and close to the principal axis are refracted outwards and appear to diverge from the focal point, F after passing through the lens.

The focal point, F is a common point on the principal axis where all rays close and parallel to the axis converge to it after passing through a convex lens, or appear to diverge from it after passing through a concave lens.

The focal length, f of a lens is the distance between the focal point and the optical centre of the lens.

For a convex lens, the ticker the lens is at the centre, the shorter is the focal length of the lens. For a concave lens, the thinner the lens is at the centre, the shorter is the focal length of the lens.

Objective: To determine the focal length of a convex lens.

Theory

From the lens formula,

1 = 1 + 1 f u v v = v + 1 f u m = v - 1 f

where m = | v | is the linear magnification. | u |
Hence the graph m versus v is a straight line graph.

The equation also shows that m is directly proportional to v.

m = 1 when v = 2 f

You May Also Find These Documents Helpful

  • Satisfactory Essays

    Biology Lab

    • 269 Words
    • 2 Pages

    Ocular lens is the lens you look through and objective lens is the lens that is close to the stage.…

    • 269 Words
    • 2 Pages
    Satisfactory Essays
  • Satisfactory Essays

    13. Refraction – The bending of a beam of light as it enters a medium of different…

    • 1273 Words
    • 4 Pages
    Satisfactory Essays
  • Satisfactory Essays

    1.08 creative photo

    • 511 Words
    • 2 Pages

    Convex lens bends the light toward the center of the lens, since one or both sides of the glass curve out.…

    • 511 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    and concave or diverging lenses. Converging lenses are thicker in the center than in the edges. Diverging lenses…

    • 745 Words
    • 6 Pages
    Good Essays
  • Good Essays

    f. Lens- The transparent structure behind the pupil that changes shape to help focus images on the retina. It is held in position by zonules extending from an encircling ring of muscle. When this ciliary muscle is relaxed, its diameter increases, the…

    • 1549 Words
    • 7 Pages
    Good Essays
  • Good Essays

    The Fresnel Lens

    • 612 Words
    • 2 Pages

    The shape of a lens makes a big difference. The lens is a transparent piece of glass or plastic with at least one curved surface. There are two types of lenses used today, the convex lens, which is also commonly called the positive lens, and the concave lens. The glass or plastic surfaces of the convex lens bulge outwards in the center. This lens also makes a parallel light ray which passes through bending it inward. The concave lens is the…

    • 612 Words
    • 2 Pages
    Good Essays
  • Good Essays

    As light rays pass through a lens with power, the rays are bent or refracted. In a lens with a plus power, the light rays converge or are refracted toward one another. The point at which the light rays converge is called the focal point and in a plus lens, is behind the lens surface. In a lens with a minus power, the light rays diverge or are refracted away from one another. If these rays are extrapolated or traced back toward the light source, the lines will converge and form a focal point in front of the lens…

    • 331 Words
    • 2 Pages
    Good Essays
  • Satisfactory Essays

    Physics Lab Report

    • 661 Words
    • 3 Pages

    4. Use the parallax method described in the lab manual to determine the focal length of the lens.Compare this length to the previously calculated values.…

    • 661 Words
    • 3 Pages
    Satisfactory Essays
  • Better Essays

    Phoropter

    • 1407 Words
    • 6 Pages

    An optical refractor or a phoropter is an optical instrument with many adjustable lenses and settings that quickly determine the patient’s exact refractive error and prescribe the exact vision correction needed when people have trouble seeing (blurred vision). Eye doctors or optometrists rely on some questions and a phoropter to determine the condition their patient has. Firstly the optometrist asks the patient what objects are blurry: far objects, near objects, or the full image. And that determines what kind of lens the optometrist will work with.…

    • 1407 Words
    • 6 Pages
    Better Essays
  • Good Essays

    * Objective Lenses are the primary optical lenses on a microscope. They range from 4x-100x and typically, include, three, four or five on lens on most microscopes. Objectives can be forward or rear-facing.…

    • 1031 Words
    • 5 Pages
    Good Essays
  • Good Essays

    Optics Lab

    • 1767 Words
    • 8 Pages

    1. Use a ruler to draw a straight line on one side of a sheet of paper near the center, then draw a perpendicular line through the center of the first line.…

    • 1767 Words
    • 8 Pages
    Good Essays
  • Satisfactory Essays

    Aperture - It dilates and contracts to control the diameter of the hole that the light passes though, to let in more or less light. It is controlled by the f-stop ring.…

    • 281 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    mechanism of vision

    • 887 Words
    • 4 Pages

    The light rays from the object pass through the conjuctiva, cornea, aqueous humour, lens and vitreous humour in that order. All these structures refract the light such that it falls on the retina. This is called focussing. Maximum focussing is done by the cornea and the lens. The light then falls on the retina.…

    • 887 Words
    • 4 Pages
    Good Essays
  • Satisfactory Essays

    fresher

    • 347 Words
    • 1 Page

    one of the most common camera lens parts on any camera is the focusing ring. This is a ring on the lens body, which moves the lens elements inside the lens. By adjusting the position of the glass elements, the image produced by the lens can be brought into clear focus. Although most modern lenses feature auto-focus, they will usually have a focusing ring to allow for manual control if desired. Generally, a switch needs to be flipped from AF (auto-focus) to M (manual) to engage the focusing ring and allow for manual focus.…

    • 347 Words
    • 1 Page
    Satisfactory Essays
  • Good Essays

    The above diagram shows that the Field of view is inversely proportional to the Focal Length of the lens used in a camera.…

    • 337 Words
    • 2 Pages
    Good Essays

Related Topics