Question

an object is placed in fornt of a concave mirror at a distance if a 25 cm and its focal length 20 cm then find the image distance and magnification and charecteries​

Answer 1

Answer:

When an object is placed at a distance of 25 cm from a mirror, the magnification is m1. The object is moved 15cm farther away with respect to the earlier position, and the magnification becomes m2. If m1/m2=4 , then calculate the focal length of the mirror. The negative sign shows that the mirror is concave.

Explanation:

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