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Sahay Sir > Question Answers > MTG NEET Physics > Part 2 > Chapter 9 - Ray Optics > A concave mirror gives an image three times as large as the object when placed at a distance of 20 cm from it. For the image to be real, the focal length should be:

A concave mirror gives an image three times as large as the object when placed at a distance of 20 cm from it. For the image to be real, the focal length should be:

A concave mirror gives an image three times as large as the object when placed at a distance of 20 cm from it. For the image to be real the focal length should be: