Question

the focal length of convex lens is 15 cm an object is placed at a distance of 25 cm away from the optic center calculate the distance of the image from the object also calculate the magnification​

Answer 1

Answer:

Given data,

f=15cm

v=30cm

h=−5cm

u=?

⇒

f

1

=

v

1

−

u

1

⇒

u

1

=

v

1

−

f

1

=

30

1

−

15

1

=

30

1−2

=

30

−1

⇒u=−30cm

Also we know that,

m=

u

+v

=

h

h

′

⇒

30

−30

=

−5

h

⇒h=+5

∴object height=5cm