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Light Reflection and Refraction Test - 22

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Light Reflection and Refraction Test - 22
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Weekly Quiz Competition
  • Question 1
    1 / -0

    The phenomenon, in which a ray of light striking a surface is sent back into the same medium from where it came, is known as:

    Solution

    Bouncing back of light rays after hitting any surface is called reflection of light. If the surface is smooth and shiny, the light will reflect at the same angle at which it hits the surface.

     

  • Question 2
    1 / -0

    According to Cartesian sign convention, .........is always considered negative.

    Solution

    According to Cartesian sign convention object distance is always considered negative

     

  • Question 3
    1 / -0

    A boy is standing at a distance of 2 m in front of a plane mirror. The distance between the boy and his image is ...........m.

    Solution

    The image formed in a plane mirror is as far behind the mirror as the object is in front of it, i.e. the distance between the object and the mirror (u) is the same as the distance between the mirror and the image (v).

    u = v = 2 m

    Distance between object (boy) and the image is u + v = 2m + 2m = 4m.

     

  • Question 4
    1 / -0

    How does light normally travel?

    Solution

    Light normally travels in a straight line.

    Light actually moves in waves once light has been produced, it will keep travelling in a straight line until it hits something else. Shadows are evidence of light travelling in straight lines.

     

  • Question 5
    1 / -0

    Angle of incidence and angle of reflection are

    Solution

    In the Law of Reflection, the angle of incidence is equal to angle of reflection

     

  • Question 6
    1 / -0

    Which mirror is suitable for dentist’s equipment to get a better view of cavity?

    Solution

    A dentist's mirror is a concave mirror, because the image appears larger or magnified, making it easier for the dentist to see the details of the object (teeth).

     

  • Question 7
    1 / -0

    The point on the principal axis, where all parallel rays meet after reflection is called?

    Solution

    The point on the principal axis, where all parallel rays meet after reflection is called Focal point. Its denoted by (F).

     

  • Question 8
    1 / -0

    The geometric centre of the mirror is called

    Solution

    The geometric centre of the mirror is called Pole.

     

  • Question 9
    1 / -0

    The optical phenomena, twinkling of stars, is due to

    Solution

    Atmospheric refraction is the phenomenon of bending of light on passing through the earth's atmosphere. Stars twinkle on account of atmospheric refraction.

     

  • Question 10
    1 / -0

    Phenomenon in which light travelling in one medium falls on surface of another medium and turns back in same medium is called

    Solution

    Phenomenon in which light travelling in one medium falls on surface of another medium and turns back in same medium is called Reflection of light.

     

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