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Light Test - 15

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Light Test - 15
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Weekly Quiz Competition
  • Question 1
    1 / -0
    We can see a non-luminous object when light:
    Solution
    We see a non-luminous object because of reflection of light. Light gets reflected from the object and reaches our eyes. Then we are able to see the object.

  • Question 2
    1 / -0
    Bouncing of light into the same medium, from which the light ray is incident, is termed as :
    Solution
    Reflection is the bouncing back of light in the same medium (as of the incident ray) by any surface.

  • Question 3
    1 / -0
    Two examples of non-luminous objects are:
    Solution
    Non luminous objects are those which do not emit light. The moon and a spoon do not emit light. So, these two are good examples of non-luminous objects.
  • Question 4
    1 / -0
    In reflection, light travels through:
    Solution
    Reflection of light is the process where the incident light on a surface is bounced back into the same medium. In reflection, the light gets reflected from the surface of second medium. Hence,here light travels only in one medium.

  • Question 5
    1 / -0
    Which of the following is a non luminous body?
    Solution
    Non luminous bodies are those bodies which do not emit light of their own, but are visible when light falls on those. Planets do not have their own light. They reflect light from the Sun and are thus visible.
    Stars and the Sun are luminous objects and they emit light.
  • Question 6
    1 / -0
    The light ray which comes out from the surface after reflection is called:
    Solution
    The ray of light which gets reflected from a polished surface is called reflected ray of light.
  • Question 7
    1 / -0
    How things are visible to us?
  • Question 8
    1 / -0
    Which property of light is known as rectilinear propagation of light?
    Solution
    Light always travels in a straight line.This property of light is known as rectilinear propagation of light.
  • Question 9
    1 / -0
    Type of reflection in which images are formed and reflection occurs from a smooth surface like that of mirror is known as:
  • Question 10
    1 / -0
    Fill in the blanks to complete the following sentences:

    i) A ray travelling towards the mirror is the _________.
    ii) Angle between reflected ray and normal is the _________.
    iii) T    he angle between reflecting surface and the reflected ray is the _________.
    Solution
    According to definition, 
    i) A ray from the object, travelling towards the mirror is the incident ray.
    ii) Angle between reflected ray and normal is the angle of reflection.
    iii) The angle between reflecting surface and the reflected ray is known as the glancing angle of reflection.

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