A image of height 2 cm formed by a convex lens when an object of height 8 cm is placed - Physics - Ray Optics and Optical Instruments

Question

A image of height 2 cm formed by a convex lens when an object of
height 8 cm is placed at a distance of 80 cm from it Find the focal
length and power of the lens?

Anshu Agrawal · Accepted Answer

Dear student,

Magnification m=IO=vuso v=IuO=2×808v=20cmnow 1f=-1u+1vf=26
6cm=0 26mPower= 1/fP=10 26=3 8D

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A image of height 2 cm formed by a convex lens when an object of height 8 cm is placed at a distance of 80 cm from it. Find the focal length and power of the lens?