Question

What is the position of an image when an object is placed at a distance of 20 em from concave mirror of focal length 20 cm?​

Answer 1

Answer:

When an object is placed at a distance of 20 cm from a concave mirror of focal length 20 cm, the position of the image is at infinity

Explanation:

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Answer 2

Answer:

1/f=1/v+1/-u put the value in it and solv it