Question

an object is 5cm size placed at 20cm infinate of a concave mirror with focal length 15cm then find image distance and charastictes of image​

Answer 1

1/f =1/v+1/u

1/-15=1/v+1/-20

1/-15+1/20=1/v

-4+3/60=1/v

-1/60=1/v

v=-60

m =h`/h=-v/u

=h`/5=-(-60)/-20

=h`=5×60/-20

h`=300/-20

h`=-15

image of distance is -60cm

hieght of image is -15

image is real and inverted

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