Question

An object is placed vertically at a distance of 20 cm from a convex lens. If the height of the

object is 5 cm and the focal length of the lens is 10 cm, What will be the position, size and

nature of the image? How much bigger will the image be as compared to the object?​

Answer 1

Answer:

Given, u=-20cm

f=10cm

v=?

We know

f

1

=

v

1

−

u

1

10

1

=

v

1

−

20

(−1)

v

1

=

20

2−1

v=20cm

We know

magnification (M)=

h

o

h

i

=

u

−v

or,

−20

20

=−1=

h

o

h

i

since,h

0

=5cm

so,h

i

=−5cm

nature = real image

Explanation:

hope it was helpfull❤️