Question

A 5cm tall object placed perpendicular to principal axis of a convex lens of focal lenght 10cm.if the object is placed 30cm away from the lens ,find the position ,size and nature of image ​

Answer 1

height of object=h0=5cm

focal length of lens=10cm

object distance=-30cm

1/f=1/v-1/u

=1/10-1/30

=3-1/30

2/30

v=30/2= 15cm

m=v/u

m=15/-30 =-1/2= -0.5cm

hi=m x ho

=-0.5x 5

= -2.5cm

object is placed beyond C and image formed is in between F and c.

Inverted, real and diminished.

Answer 2

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