A short linear object of length b lies along the axis of a concave mirror of focal length…
Physics · JEE Main · NTA Exams — Optics
A short linear object of length b lies along the axis of a concave mirror of focal length f at a distance u from the pole of the mirror. The size of the image is approximately equal to
- \(b\left(\frac{u-f}{f}\right)^{1 / 2}\)
- \(b\left(\frac{f}{u-f}\right)^{1 / 2}\)
- \(b\left(\frac{u-f}{f}\right)\)
- \(b\left(\frac{f}{u-f}\right)^{2}\)
Answer
(D) b ( f u-f )^ 2
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