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| 1. |
An object is place at a distance of 9cm from the concave mirror so that real image is formed, if object is moved away 6cm further then size of image will becomes 1/4th of previous image. find out the focal length of the concave mirror? |
| Answer» TION: f = ? U = - 9cmv =?h = -v/u = -v/ 9U = -15 V = ?F = f/41/F = 1/v | |