COPY: Class 10 Physics - Light and The Human Eye Quiz
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Questions and Answers

What are the two laws of reflection?

  • Reflection angle equals refracted angle, and incident ray, refracted ray, and normal all lie on the same plane
  • Incident angle equals reflected angle, and incident ray, refracted ray, and normal all lie on the same plane
  • Refraction angle equals incident angle, and incident ray, refracted ray, and normal all lie on the same plane
  • Reflection angle equals incident angle, and incident ray, reflected ray, and normal all lie on the same plane (correct)

    • Why is red colour selected for danger light signals?

  • Red light has the longest wavelength, making it visible from a distance
  • Red light has a soothing effect on the eyes in stressful situations
  • Red light is least scattered by fog or smoke, ensuring better visibility (correct)
  • Red light has the shortest wavelength, making it more noticeable during the day

    • What is meant by the term power of accommodation? Name the part of our eye that is responsible for the power of accommodation.

  • Power of accommodation refers to the ability of the eye to distinguish between colors. The cornea is responsible for the power of accommodation.
  • Power of accommodation refers to the ability of the eye to focus on objects at varying distances. The iris is responsible for the power of accommodation. (correct)
  • Power of accommodation refers to the ability of the eye to perceive depth. The sclera is responsible for the power of accommodation.
  • Power of accommodation refers to the ability of the eye to adjust to different light levels. The pupil is responsible for the power of accommodation.

    • What is dispersion of light?

    <p>Dispersion of light is the splitting of white light into its constituent colors</p> Signup and view all the answers

    Which type of mirror is used outside the driver's side of a vehicle?

    <p>Convex mirror</p> Signup and view all the answers

    A doctor has prescribed a corrective lens of power +1.5 D. Find the focal length of the lens. Is the prescribed lens diverging or converging?

    <p>-0.67m, diverging lens</p> Signup and view all the answers

    Why is a convex mirror preferred as a rear-view mirror in vehicles?

    <p>It provides a wider field of view</p> Signup and view all the answers

    What is the definition of refraction of light?

    <p>Change in direction of light as it passes from one medium to another</p> Signup and view all the answers

    What is the mirror image of the word 'AMBULANCE'?

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

    What is the mirror formula used in optics?

    <p>$rac{1}{f} = rac{1}{v} + rac{1}{u}$</p> Signup and view all the answers

    What are the two laws of reflection?

    <p>Law of reflection and law of reversibility</p> Signup and view all the answers

    List three differences between real and virtual images.

    <p>Real images can be projected on a screen, virtual images cannot be projected.</p> Signup and view all the answers

    Why is red color selected for danger light signals?

    <p>Red light has the longest wavelength</p> Signup and view all the answers

    Name the three common defects of vision and their causes.

    <p>Nearsightedness (myopia), farsightedness (hypermetropia), astigmatism</p> Signup and view all the answers

    What are two uses of concave mirrors?

    <p>Concave mirrors are used in solar cookers and make-up mirrors</p> Signup and view all the answers

    Define power of lens and write its S. I. unit.

    <p>$P = \frac{1}{f},$ where $f$ is the focal length; SI unit: dioptre (D)</p> Signup and view all the answers

    Q1 What is your Name?

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

    Q2 What is Apple?

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

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