Optics and Light Quiz
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Questions and Answers

Define Ray in the context of optics.

  • A region formed where light rays are absent partially or totally
  • An imaginary line which tells us about the propagation of light energy (correct)
  • A bunch of ray or a group of rays
  • A body which emits light energy and with the help of it other objects are visible

    • What is the limit of resolution for human eye?

  • 4000 to 8000 Angstrom
  • Yellow
  • An imaginary line which tells us about the propagation of light energy
  • 1÷60° (correct)

    • What is the wavelength range for visible light?

  • 4000 to 8000 Angstrom (correct)
  • One minute
  • An electromagnetic wave with certain part in the visible spectrum
  • A form of energy which gives us the sensation of vision

    • What does a source of light do?

    <p>Emits light energy and enables other objects to be visible</p> Signup and view all the answers

    What is shadow in the context of optics?

    <p>When the path of light ray is obstructed by an opaque object</p> Signup and view all the answers

    According to the given text, what is the formula for magnification?

    <p>$m = \frac{h_i}{h_o}$</p> Signup and view all the answers

    In the context of reflection, what is defined with the help of the incident ray?

    <p>Real object</p> Signup and view all the answers

    What is the net angle of deviation due to 2 inclined plane mirrors when the angle of incidence is less than the angle of inclination?

    <p>$\Delta = 360 - 2\theta$</p> Signup and view all the answers

    Why does the graph of angle of deviation and angle of incidence not touch the X-axis according to the given text?

    <p>Because angle of deviation cannot be zero</p> Signup and view all the answers

    How many reflections are suffered due to deviation due to 2 inclined plane mirrors when the angle of incidence is less than the angle of inclination?

    <p>Two reflections</p> Signup and view all the answers

    What is the wavelength range for visible light?

    <p>4000 to 8000 Angstrom</p> Signup and view all the answers

    What is the limit of resolution for the human eye?

    <p>One minute or 1÷60°</p> Signup and view all the answers

    What does a source of light do?

    <p>Emits light energy</p> Signup and view all the answers

    Define Ray in the context of optics.

    <p>An imaginary line describing the propagation of light energy</p> Signup and view all the answers

    What is shadow in the context of optics?

    <p>An area where light is partially obstructed</p> Signup and view all the answers

    What is the angle of deviation when two plane mirrors are perpendicular to each other?

    <p>180°</p> Signup and view all the answers

    If the angle of incidence is less than the angle of inclination, how many reflections are formed due to 2 inclined plane mirrors?

    <p>Three reflections</p> Signup and view all the answers

    What happens when the incident ray and the final reflected ray are antiparallel to each other in the case of two plane mirrors?

    <p>The angle of deviation is zero</p> Signup and view all the answers

    What is the net angle of deviation due to 2 inclined plane mirrors when the angle of incidence is less than the angle of inclination?

    <p>$360-2\theta$</p> Signup and view all the answers

    Why does the graph of angle of deviation and angle of incidence not touch the X-axis?

    <p>Because the angle of deviation cannot be zero</p> Signup and view all the answers

    Study Notes

    Optics Fundamentals

    • A ray in optics is a line that represents the direction of light travel.

    Light and Human Eye

    • The limit of resolution for the human eye is the minimum distance at which two objects can be distinguished as separate.
    • Visible light has a wavelength range of approximately 400-700 nanometers.

    Light Source and Shadow

    • A source of light emits light energy.
    • A shadow is the dark region formed when an object blocks light from reaching a surface.

    Magnification and Reflection

    • The formula for magnification is not provided in the given text.
    • In the context of reflection, the angle of incidence is defined with the help of the incident ray.

    Plane Mirrors and Deviation

    • When two plane mirrors are inclined, the net angle of deviation is equal to the sum of the deviations produced by each mirror.
    • If the angle of incidence is less than the angle of inclination, the graph of angle of deviation and angle of incidence does not touch the X-axis because the angle of deviation is never zero.
    • In this case, the light suffers two reflections.
    • When two plane mirrors are perpendicular to each other, the angle of deviation is 180 degrees.
    • If the incident ray and the final reflected ray are antiparallel (opposite directions), the light has been rotated by 180 degrees.
    • When the angle of incidence is less than the angle of inclination, two reflections are formed due to the 2 inclined plane mirrors.

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    Description

    Test your knowledge of optics and light with this quiz covering topics such as the nature of light, visible light spectrum, human eye sensitivity, and ray optics.

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