A man of height 1.6 m stands in front of a vertical plane mirror. The mirror size is just sufficient for the man to see his complete image. The distance between man’s eye and his feet is 1.5m. What is the height of bottom point of mirror from the ground?
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Answer:0.1m i think
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The height of the bottom point of the mirror from the ground is 75cm.
- We know from the laws of reflection that the angle of incidence is equal to the angle of reflection.
- So, the point of incidence of the light coming from an object being reflected from a mirror always lies midway between the object and the eye.
- To form the total image of a body, the height of the mirror must be at least half the height of the body.
- Here the size of the body is 1.6 m. So the size of the mirror required is 80cm.
- Since his height from his feet is 150cm, the height of the bottom point of the mirror from the ground must be 75cm.
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