Question

concave mirrors having focal length 20 CM and placed a object in front of it at a distance of 80 CM having height 5 CM . find image distance and magnification​

Answer 1

Answer:

mirror -concave

in mirror

1/v+1/u =1/f

1/v + 1/-80=1/-20

1/v-1/80=-1/20

1/v= -1/20+1/80

1/v=-4+1/80

1/v=-3/80

v=-80/3 cm

magnification = -v/u

=-(-80/3) /-80

80/3 /-80

m=-1/3

Explanation:

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