Question

Prove that f = R/2 in concave mirror

Answer 1

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Answer 2

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PART A We know that if the object is at the center of radius of curvature R, then the image is also at the center of radius of curvature. So fo = fi = R Using the thin lens formula 1/fo + 1/fi = 1/ffl Substituting R we get 1/R + 1/R = 1/