Question

A concave mirror of focal length 10 cm is placed at a distance 35 cm from a wall.
How far from the wall should an object be placed so that its real image is formed
on the wall?

Answer 1

Answer:

Here, f =-10cm; v =-35 cm (since the image is formed on the wall and distance between the wall and mirror is 35cm). Image is beyond 2f so object has to be in between F and C. Let the distance of the object from the wall be x. Therefore, the distance of the object from the wall = 21 cm.

Explanation:

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