. A rod of length 10 cm lies along the principal axis of a concave mirror of focal length

10 cm in such away that the end closer to the pole is 20 cm away from it. Find the length of the image.

A: 2 cm

B: 4 cm

C: 5 cm

D: 6 cm


Best Answer


The position of image of nearer end to mirror can be found out using mirro equation


Similarly position of image of farther end to mirror can be found out as


Thus, the length of the image = 20 - 15 =5cm.

Final Answer:

Hence,the length of the image is 5cm.


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