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An observer moves towards a stationary plane mirror at a speed of 4 ms^-1 with what speed – will his image move towards him?

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An observer moves towards a stationary plane mirror at a speed of 4 ms-1 with what speed – will his image move towards him?

(a) 2 ms-1

(b) 4 ms-1 

(c) 8 ms-1 

(d) the image will stay at rest

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1 Answer

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(c) 8 ms-1

Speed of the image towards the observer = 2 x 4 = 8 ms-1

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