Question

A convex lens of focal length 10 cm is placed at a distance of 12cm from a wall. How far should an object be placed so to form real image on Wall?

Answer 1

A convex lens of focal length 10 cm is placed at a distance of 12cm from a wall. How far should an object be placed so to form real image on wall?

Good question,

Here is your perfect answer!

Here f = 10cm,

v =12cm,

By lens formula,

=) 1/v - 1/u = 1/f

=) 1u = 1/v - 1/f

=) 1/u = 1/12 - 1/10

=) 1/u = 5-6/60

=) 1/u = - 1/60

=) u = - 60cm.

Infront (-).

Answer 2

Heya _____

A convex lens of focal length 10 cm is placed at a distance of 12cm from a wall. How far should an object be placed so to form real image on Wall ______

Solution ___________

It will be find out by using the ____

lens formula _____

1/u -1/v = 1/f

1/u = 1/v-1/f

1/u = 1/v-1/10

1/u = 5-1/60

1/u = -1/60

u = -60 cm

Thank you