Optics Review Solutions - Key Concepts
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Questions and Answers

What is the focal length of the convex surveillance mirror in the convenience store?

  • -0.40 m (correct)
  • 0.40 m
  • 1.46 m
  • 4.5 m

    • The image formed by a concave mirror is always real.

    False

    What happens to light when it refracts from water to air?

    It bends away from the normal.

    The speed of light in fused quartz is calculated, given the index of refraction is 1.46. The speed of light is approximately _____ m/s.

    <p>204000000</p> Signup and view all the answers

    Match the following terms with their definitions:

    <p>Focal length = The distance from the mirror to the focal point Concave mirror = A mirror that curves inward and can form virtual or real images Convex mirror = A mirror that curves outward and always forms virtual images Critical angle = The angle of incidence above which total internal reflection occurs</p> Signup and view all the answers

    An object is placed 10 cm in front of a concave mirror with a focal length of 6 cm. What type of image is formed?

    <p>Virtual and upright</p> Signup and view all the answers

    What measures the angle of incidence when light hits a surface?

    <p>The angle between the incident ray and the normal.</p> Signup and view all the answers

    Light travels from air to glass to water. As it passes into the denser medium, it _____ and speeds up.

    <p>slows down</p> Signup and view all the answers

    What is the formula for refraction that describes the relationship between the angles and indices of refraction of two media?

    <p>$n_1 sin heta_1 = n_2 sin heta_2$</p> Signup and view all the answers

    Total internal reflection occurs when light transitions from a less dense medium to a denser medium.

    <p>False</p> Signup and view all the answers

    What is the main characteristic of a real image formed by a lens?

    <p>It can be projected on a screen.</p> Signup and view all the answers

    The bending of light as it passes from one medium to another is called __________.

    <p>refraction</p> Signup and view all the answers

    Match the following types of light production to their definitions:

    <p>Incandescence = Light produced from heat Fluorescence = Light emitted while absorbing radiation Bioluminescence = Light produced by living organisms Laser = Light amplified by stimulated emission of radiation</p> Signup and view all the answers

    What is the primary effect of increasing the index of refraction (n) when light passes from air into water?

    <p>Light slows down</p> Signup and view all the answers

    For a concave mirror, the focal point is located:

    <p>In front of the mirror</p> Signup and view all the answers

    What is defined as the increase in size of an image produced by a lens called?

    <p>Magnification</p> Signup and view all the answers

    Myopia, or nearsightedness, occurs when the image is focused behind the retina.

    <p>False</p> Signup and view all the answers

    The equation to calculate the magnification of a lens is __________.

    <p>M = rac{h_i}{h_o}</p> Signup and view all the answers

    Study Notes

    Optics Review Solutions - Key Concepts

    • Light Properties and Production: Light has three main properties: luminous (producing its own light), non-luminous (reflecting light), and electromagnetic spectrum. Methods of light production include incandescence, electric discharge, fluorescence, phosphorescence, chemiluminescence, bioluminescence, and triboluminescence. Light production also includes Light Emitting Diodes (LEDs) and Lasers.

    Reflection in Plane Mirrors

    • Laws of Reflection: Specular (smooth surface) and diffuse (rough surface) reflection; angles of incidence and reflection are equal.
    • Image Formation: Real vs. virtual images.
    • Describing Images (SALT): Size (S), Attitude (A), Location (L), and Type (T) – used to describe images created by plane mirrors.
    • Ray diagrams: Useful for visualizing the path of light rays and determining image characteristics.

    Reflection in Curved Mirrors

    • Concave (Converging) Mirrors:

      • Ray Diagrams: Visualizing image formation.
      • SALT for concave mirrors:
      • Curved mirror equation: describing image magnification.
      • Magnification equations: calculating image size. -Understanding signs (f, di, & hi): important for determining image characteristics.

    • Convex (Diverging) Mirrors: -Ray Diagrams: Visualizing image formation.
      -SALT for convex mirrors:
      -Curved mirror equation/ magnification equation. -Magnification equation: calculating image size. -Understanding signs (f,di, & hi) for convex mirrors.

    Refraction

    • Index of Refraction (n): A measure of how much a material slows down the speed of light.
    • Refraction in Different Media: Light changes speed, and thus direction, when moving from one medium to another. Light bends towards the normal when it enters a denser medium and away from the normal when it enters a less dense medium.
    • Total Internal Reflection (TIR): How light reflects off a surface and does not pass through. The critical angle is the specific angle where total internal reflection occurs.
    • Critical Angle: The angle of incidence at which light is refracted at an angle of 90° relative to the normal; beyond this angle, total internal reflection happens
    • Dispersion: The separation of white light into its component colours (spectrum).

    Lenses

    • Converging (Convex) Lenses: -Ray Diagrams: Illustrating image formation. -SALT: describing characteristics of Images produced. -Thin lens equation: for calculating image distance. -Magnification equation: to determine image height. -Signs for lenses (f, di, hi, M): important for determining image characteristics.
    • Diverging (Concave) lenses: -Ray Diagrams: Illustrating image formation. -SALT: describing characteristics of Images. -Thin lens equation/magnification equation for calculation. -Signs for lenses (f, di, hi, M) for image characteristics.

    The Human Eye

    • Anatomy and Function: Details of the eye's structure and operation.
    • Common Eye Problems: Myopia, Hyperopia, Presbyopia, and Astigmatism – common eye conditions and how they are corrected.

    Problem Solving Examples

    • Various examples of using optics equations to solve for image distance, focal length, etc. Detailed solutions are shown, demonstrating the application of the different formulas.

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    Optics Review Package 2 Solutions PDF

    Description

    This quiz focuses on key concepts of optics, covering properties of light, reflection in plane and curved mirrors, and image formation. Understand the laws of reflection, characteristics of images, and various methods of light production. Prepare to test your knowledge on these fundamental principles of optics.

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