Question

00
Given that
Races of curvature + 8cm
focal length = et R/2 812 & 4 cm.
object distana cu) + 20 cm
Image
distance (V) ?​

Answer 1

Answer:

1) v = +5cm ( in a mirror )

2) v = +3.3333......cm ( in a lens )

Explanation:

As the details in question is incomplete , 2 cases will arise....

1) if image distance is asked in a spherical mirror ,

we will use mirror formula:-

1/f = 1/v + 1/u

2) if image distance is asked in a spherical lens ,

we will use lens formula:-

1/f = 1/v - 1/u