If an image is formed three times the size of the object and is inverted, what is the possible position of the object with respect to a concave mirror of focal length 10 cm?

Question

If an image is formed three times the size of the object and is inverted, what is the possible position of the object with respect to a concave mirror of focal length 10 cm? — Exam MCQ

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A. Object placed 13.3 cm from the mirror — Using f = -10 cm and m = -v/u = -3 gives v = 3u. Then 1/f = 1/u + 1/(3u), so u = 4f/3 = -13.33 cm. The object is 13.3 cm in front of the mirror.

rrbjepyq.in · Answer

B. Object placed 6.6 cm from the mirror

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C. Object placed 10 cm from the mirror

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D. Object placed 20 cm from the mirror

If an image is formed three times the size of the object and is inverted, what is the possible position of the object with respect to a concave mirror of focal length 10 cm?

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