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A concave mirror produces three times larger image of an object placed at a distance of 15 cm in front of it. Calculate the image distance and the focal length of the concave mirror. |
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Answer» Answer: so plz CONVERT into your problem Explanation: Given parameters The concave mirror produces three times enlarged image, so m = 3 u = -10 cm
m=−vu
3 = (-V)/(-10) v = +30 The DISTANCE between the mirror and image = 30 cm From mirror formula, we know
1v+1u=1f
130+1−10=1f
(-2)/30 = 1/f -1/15 = 1/f f = – 15 cm The radius of curvature R = 2f ∴ R = 2 × (- 15) R = – 30 cm |
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