Question

A 5cm tall object is placed perpendicular to principal axis of a convex lens of 50cm distance of object is 40cm find the nature, position, and size of image formed
​

Answer 1

Answer:

Explanation:

Given object size = 5 cm

u = -30 cm

f = 20 cm, v = ?

Using the lens formula 1/f = 1/v-1/u

We have 1/v = 1/u + 1/f = 1/-30 + 1/20 = -2+3/60 = 1/60

===> 1/v = 1/60

Therefore v = 60cm

Magnification v/u = 60/-30 = -2

Magnification = Image size/Object size

$h _{ i }$/$h _{ o }$ = -2

$h _{ i }$/5 = -2

$h _{ i }$ = -2x5 = -10 cm

The image is real inverted and magnified.