# An Object Is Placed At A Distance Of 20cm From The Pole Of A Concave Mirror Of Focal Length 10cm. The Distance Of The Image Formed Is?

Given

$$\frac{1}{v} + \frac{1}{u} = \frac{1}{f}$$

= $$\frac{1}{v} + \frac{1}{-20} = \frac{-1}{10}$$

= $$\frac{1}{v} = -\frac{-1}{10} + \frac{1}{-20}$$

= $$\frac{1}{v} = \frac{-2 + 1}{20}$$

= $$\frac{-1}{20}$$

v = -20cm

The distance of the image formed is-20cm and the nature of the image: Virtual

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