Question

an object if height 6 cm is placedat a distance of 20 cm in front of a cincave lens of power 8d . find the suze of the image ​

Answer 1

Explanation:

p= 1/f

-8= 1/f

1/-8=f

so therefore, 0.12=f.

now ... 1/f= 1/v-1/u

1/0.12= 1/v - 1/ -20

1/0.12 + 1/20= 1/v

1/8.38=1/v

hence- 8.38=v

m = v/u

m= 8.38/-20

m=0.41

hence-> image is diminished.

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