Identifying Direction of Shadow


 
 
Concept Explanation
 

Identifying Direction Of Shadow

A shadow is a dark area where light from a light source is blocked by an opaque object. It occupies all of the three-dimensional volume behind an object with light in front of it. The cross section of a shadow is a two-dimensional silhouette, or a reverse projection of the object blocking the light.

Problems Involving Shadows : Shadows are formed when the person is obstructing the path of light. In the morning as the Sun rises from the East.

  •  If a person facing towards Sun that is East, the shadow will be towards his back or in West.
  • If a person facing towards South, the shadow will be towards his right. that is West
  • If a person facing towards West, the shadow will be towards his front. or West
  • If a person facing towards North, the shadow will be towards his left which is  West
  • But in the evening as we know the sets in the West. All these directions will be reversed.

  • When two persons facing each other during sunrise, the shadow of both are formed at the left of the person facing north.
  • When two persons facing each other during sunrise, the shadow of both are formed at the right of the person facing south.
  • When two persons facing each other during sunset, the shadow of both are formed at the right of the person facing north.
  • When two persons facing each other during sunset, the shadow of both are formed at the left of the person facing south.
  • Illustration :  If a person walking in east during sunrise, In which direction the shadow formed?

    A  Shadow formed in his front                 B  Shadow formed in his back                C  Shadow formed in his left                D  Shadow formed in his right    

    Answer : B

    Solution : In the above question, the person walking in east during sunrise. During sunrise, the sun rises in east, and shadow formed in west direction.

    So, the image formed in west ,i.e., in the back of the person.

    Hence the correct option is B.

    Illustration :  If a person walking in north during sunrise, In which direction the shadow formed?

    A  Shadow formed in his front                 B  Shadow formed in his back                C  Shadow formed in his left                D  Shadow formed in his right    

    Answer : C

    Solution : In the above question, the person walking in east during sunrise. During sunrise, the sun rises in east, and shadow formed in west direction.

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    Sample Questions
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    Question : 1

    If a person walking in northeast when the light source present in same direction, In which direction the shadow formed?

    Right Option : C
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    Explanation
    Question : 2

    If the person walking towards west and his shadow is just formed in his front, in which direction the light source is located?

    Right Option : A
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    Explanation
    Question : 3

    If the person is walking towards south during sunrise, in which direction his shadow is formed?

     

    Right Option : D
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    Explanation
     
     
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