MCQOPTIONS
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MCQOPTIONS
| 1. |
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 [MP PET 1997] |
| A. | \[{{x}_{1}}{{x}_{2}}\] |
| B. | \[\sqrt{{{x}_{1}}{{x}_{2}}}\] |
| C. | \[\frac{{{x}_{1}}+{{x}_{2}}}{2}\] |
| D. | \[\sqrt{\frac{{{x}_{1}}}{{{x}_{2}}}}\] |
| Answer» C. \[\frac{{{x}_{1}}+{{x}_{2}}}{2}\] | |