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Light Shadows And Reflection Test - 8

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Light Shadows And Reflection Test - 8
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Weekly Quiz Competition
  • Question 1
    1 / -0
    A body which has no light of its own, but is visible because it reflects light, is called
  • Question 2
    1 / -0
    A medium, which is made up of the same particles having the same properties everywhere is known as
  • Question 3
    1 / -0
    Rectilinear propagation of light means
    Solution
    Rectilinear propagation of light means travelling of light in a straight line in homogeneous medium.
  • Question 4
    1 / -0
    The three primary colours are
    Solution
    The three primary colours are red, green and blue.
  • Question 5
    1 / -0
    We are able to see the objects due to
    Solution
    We are able to see the objects due to the reflected light from the object
  • Question 6
    1 / -0
    If a ray of light is incident on a plane mirror at an angle of 20o with the mirror, what will be the angle of reflection?
    Solution
    Angle of incidence = Angle of reflection.
    The incident ray will have an angle of incidence of (90° - 20° =) 70° (made with a normal to the mirror surface). So, the reflected ray will make an angle of 70 degrees with the normal.

  • Question 7
    1 / -0
    Which of the following is the best reflector of light?
  • Question 8
    1 / -0
    If angle of incidence is 45º, what will be the angle of reflection?
  • Question 9
    1 / -0
    Which of the following statements is NOT true?
  • Question 10
    1 / -0
    What is the angle of incidence in the figure as shown below?

  • Question 11
    1 / -0
    When a ray of light from air enters a denser medium, it
  • Question 12
    1 / -0
    The ray of light, which suffers bending, is called
  • Question 13
    1 / -0
    Which of the following has the highest refractive index?
  • Question 14
    1 / -0
    Which of the following statements is incorrect?
  • Question 15
    1 / -0
    A lens forms an inverted image of an object. What kind of lens is it?
  • Question 16
    1 / -0
    When a white light ray falls on a hollow prism, then
    Solution
    When a white light ray falls on a hollow prism, then the light emerging from the prism gives no dispersion because surface and hollow prisms behave like slabs and thus, there is no dispersion.
  • Question 17
    1 / -0
    Which colour gets refracted the most while passing through a prism?
    Solution
    Violet colour gets refracted the most while passing through a prism. The lesser is the wavelength, the greater is the angle of deviation.
  • Question 18
    1 / -0
    Which phenomenon gives rise to Tyndall effect?
    Solution
    The Tyndall effect, also known as Tyndall scattering, is light scattering by particles in a colloid or else particles in a very fine suspension.
  • Question 19
    1 / -0
    The clear sky appears blue because
    Solution
    The clear sky appears blue because light of violet and blue colours gets scattered more than the light of all other colours by the atmosphere.
  • Question 20
    1 / -0
    Which of the following statements is correct?
    Solution
    Scattering is the process of absorption and then re-emission of light energy.
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