Question

A convex lens of power 4D forms a real and inverted image three times the size of an object find the position of the object and image

Answer 1

Answer: please like

Explanation:

Dear Student,

Given,

Power = 4 D

u = - 10cm

f = ?

v = ?

As we know , P = 100 / f

==> f = 100 / 4

==> f = 25

Now ,

==> 1 / f = 1 / v - 1 / u

==> 1 / v = 1 / f + 1 / u

==> 1 / v = 1 / 25 + 1 / (-10)

==> 1 / v = (2 - 5) / 50

==> v = (- 50) / 3

==> v = - 16.66 cm

Regards