Question

Determine the distance of 20cm to the right following 30cm to the right

Answer 1

Explanation:

When an object is placed between 2f and f (focal length) of the diverging lens, the image is virtual, erect, and diminished as shown in the graph. To compute the distance of the image from the lens, we apply

f

1

=

v

1

−

u

1

⇒

−20

1

=

v

1

−

30

1

⇒v=

20+30

(20)(30)

=−12 cm (to the left of the diverging lens.)