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29/12/2021 12:32 pm
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Find the radius of curvature of a concave mirror. If the object is at d1 distance away from Pole and image formed is at d2 distance away from Pole
(a) \(\frac{2d_1d_2}{d_1 + d_2}\)
(b) \(\frac{d_1d_2}{d_1 + d_2}\)
(c) \(\frac{d_1d_2}{2d_1 + d_2}\)
(d) \(\frac{d_1d_2}{d_1 + 2d_2}\)
1 Answer
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29/12/2021 12:38 pm
Correct answer:(a) \(\frac{2d_1d_2}{d_1 + d_2}\)
Explanation:
Using Newton’s formula, we have
xy = f2
(d1 − f)(d2 − f) = f2
f = \(\frac{d_1d_2}{d_1 + d_2}\)
Radius of curvature,
Roc = 2f = \(\frac{2d_1d_2}{d_1 + d_2}\)