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  • If a plane mirror is approaching you with a speed of 10 cm/s, your image shall approach you with a speed of  Give y

If a plane mirror is approaching you with a speed of 10 cm/s, your image shall approach you with a speed of 

Give your answer in cm/s

Option: 1

10


Option: 2

20


Option: 3

30


Option: 4

15


Answers (1)

best_answer

 If x is the distance between the object and the mirror, 2x is the distance between the object and its image because for a plane mirror object distance is equal to the image distance. So if the plane mirror is approaching the object with a speed of x/t, then the image will approach the object with a speed of 2x/t.
So

\text{If}, \ \frac{x}{t} = 10 cm/s, then, \ \frac{2x}{t} = 20 cm/s.


Hence the image will approach you at a speed of 20 cm/s.

Posted by

rishi.raj

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