Question

A car drives by approximately 20 metres from the convex side of a reflective structure, and its image appears to be one fifth of the size of the car what is the focal length of this reflective surface?​

Answer 1

Mirror formula:

(1/v) + (1/-280) = 1/20

(1/v) = (1/20) + (1/280)

v = 280/15

v1 = -(v/u)2 vom

v1 = -(280/15X280)2 . 15

v1 = -15/(15x15)

v1 = -1/15 m/s

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