Question

find the distance of the image when an object is placed on the principal axis at a distance of 20cm in front of a concave mirror whose radius of curvature is 8cm​

Answer 1

Answer:

5cm from principle axis in the same direction as the object

Explanation:

here,

focus, f=R/2=-8/2=-4cm

position of object, u=-20cm

Let the position of image be v

using the equation, 1/f = 1/v + 1/u, we get v= -5cm

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