Question

A object is placed 80 cm from a concave lens having radius of curvature 40 cm find the nature and position of the image​

Answer 1

u=80cm

f=20cm

v=?

1/f =1/v -1/u

1/20=1/v-1/80

1/v=1/20+1/80

1/v= 4+1/80

1/v=5/80

v=80/5

v=16cm

the image is virtual and position of image is 16cm.

Hope it help you

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