Ray Optics and Optical Instruments

Question: In a concave mirror experiment, an object is placed at a distance ${x_1}$ from the focus and the image is formed at a distance ${x_2}$ from the focus. The focal length of the mirror would be

1) ${x_1}{x_2}$

2) $\sqrt {{x_1}{x_2}} $

3) $\frac{{{x_1} + {x_2}}}{2}$

4) $\sqrt {\frac{{{x_1}}}{{{x_2}}}} $

Solution:

Explanation: No Explanation

Spherical Mirrors

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