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Question
What is the minimum length of the mirror required to visualised the complete image of the body of a person of height H.
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Solution
The correct option is A H2
The person must have to obtain a reflected ray one from his head and another reflected ray from the feet.
Geometrically, AC = AB + BC where
AB=x2 and BC=H−x2
⇒AC=x2+H−x2
⇒AC=H2 i.e. length of the mirror is just half the height of person.
The person must have to obtain a reflected ray one from his head and another reflected ray from the feet.
Geometrically, AC = AB + BC where
AB=x2 and BC=H−x2
⇒AC=x2+H−x2
⇒AC=H2 i.e. length of the mirror is just half the height of person.
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