Question

An object of height 3cm is placed at 10cm from a convex lens which produces an image
at 20 cm from its optical centre. Calculate the magnification and height of the image
produced.​

Answer 1

Answer:

the answer is image height is 6cm.....

Answer 2

Answer:

6cm

Explanation:

Let the height be h

u= -10cm (since it is a conex send we put "-")

v=20cm

To find :

Magnification (m)

Height(h')

Formula:

m=v/u

m=h'/h

Solution :

magnification (m)=v/u

=20/-10

=-2

Height of image(h')=m×h {from m=h'/h}

=-2×3

=-6

{since height cannot be negative we take h' = 6cm}