1.

A concave lens has focal length of 25 cm. At what distance from the lens, a 7.5 cm tall object be placed so that it forms an image at 10 cm from the lens? Also calculate the size of the image formed.​

Answer»

tion:f.l.=25cmheight of object =7.5 cmv=10 CM using LENS FORMULA 1/v-1/u=1/f1/10-1/u=1/25-1/u=2-5/50-1/u=-3/50u=50/3for calculating SIZE of object use formula of magnification



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