Question

An object 1 cm in height is placed at a distance of 0.80m from a double convex lens of focal length 0.2m. Find the location and size of the image formed by(a) calculation and (b) the graphical method.​

Answer 1

Answer:

ho=1

u= -8cm

f=20cm

1/v = 1/f + 1/u

=1/20+1/8

=7/40

v= 40/ 7

=5.71cm

hi / ho = v / u

=hi = v / u × ho

= 5.71 / -8 × 1

= -0.71 cm