Anonymous asked in Science & MathematicsPhysics · 8 years ago

What must be the minimum height of a plane mirror so that a boy of height 162 cm can view himself from head to?

Toe? A. 40.5 cm. B. 81 cm. C. 162 cm. D. 324 cm

2 Answers

  • Zardoz
    Lv 7
    8 years ago
    Favorite Answer

    81 cm.

    A photon from his toe hits the mirror and bounces to his eye. The angle the photon hits the mirror at will be the same as the angle it reflects at. Therefore, the photon hits the mirror half way between his toe and eye. Any mirror below that point would be surperflous. That same argument applies to his crown. Half the distance from his eye to his toe plus half the distance from his crown to his eye is equal to half the distance from his toe to his crown.

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  • 3 years ago

    i think of that top is a few thing that no you may nevertheless make it easier to with aside out of your genes if the two one in all your parents are tall then there would nevertheless be a gamble so which you will improve taller. you're only 17 years previous and function 365 days of growth left so relax possibly you will improve this year i've got self belief you may concentration on your posture and form of garments you place on because of the fact posture can make it easier to learn that top that's hidden once you slouch and maximum appropriate style of vogue in clothing facilitates to make you seem taller than you incredibly are. better of excellent fortune

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