Question

an object of size 4 cm is placed at 27cm from the concave mirror and radius of curvature is 30 cm find the position of image and also find its magnification


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Answer 1

Answer:

radius of curvature/2= focal length so f is -15 cm for concave mirror , u is -27 cm , ho = 4 cm

use mirror formula

1/f=1/v+1/u , -1/15=1/v+(-1/27) -1/15+1/27=1/v , -9+5/135=1/v. means v is -135/4 cm. for magnification , m= -v/u , m= -(-135/-27×4) then m is -5/4