Multiple Reflections


 
 
Concept Explanation
 

Multiple Reflections

We know that plane mirror reflects light falling on it. This reflected ray can act as incident ray for another mirror. This process of reflection of light several times between reflecting surfaces is known as Multiple reflection of light.

  • Multiple reflection can be obtained by placing more than one mirror at certain angle to each other which results in reflection of light for multiple times between reflecting surfaces.
  • Multiple reflection is used for different purposes:

      1.  At barbar shop to see the back of our head .

      2.  Periscope:  This instrument works on the principle of multiple reflection. A periscope is a tool we use to see things that would otherwise be hidden or obstructed or not in the direct line of sight.

      3.  Kaleidoscope  In this toy  beautiful patterns are formed due to multiple reflections. It works on the principle of multiple reflection in inclined plane mirrors.

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    Sample Questions
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    Question : 1

    Which of the following are correct :

    (a) Multiple reflection is used in a instrument like periscope.

    (b) Multiple reflection is used at barbar shop to see the back of our head .

    (c) A periscope is a tool we use to see things that would otherwise be hidden or obstructed or not in the direct line of sight.

    Right Option : D
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    Explanation
    Question : 2

    In which of the following multiple mirrors are used for multiple reflection ?

    Right Option : D
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    Explanation
    Question : 3

    In which of the following multiple reflection is used ?

    Right Option : D
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    Explanation
     
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