Question

Ned

An object is placed (90 cm) from a convex lens whose focal length is
(30cm). What is the image position (xi)?

Answer 1

45 cm

Step-by-step explanation:

The formula to apply in this question is that of object distance , image distance and focal length.

This is written as;

`(1)/(f) =(1)/(o) +(1)/(v)`

where;

f= focal length = 30cm

o= object distance = 90 cm

v= image distance = ?

Applying real values as;

1/30 = 1/90 + 1/v

1/30 - 1/90 = 1/v

1/45 = 1/v

v= 45 cm