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Question

Find the position and nature of the image formed by the concave mirror of focal length 20 cm, if the object O is placed at a distance 30 cm from the pole.

A
60 cm, Virtual image
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B
+60 cm, Real image
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C
60 cm, Real image
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D
+60 cm, Virtual image
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Solution

The correct option is C 60 cm, Real image
Given:
u=30 cm
f=20 cm
So, 1v+1u=1f
1v130=120
1v=160
v=60 cm
As the image is formed on the same side of the concave mirror, the image is real.

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