Question

A lens 17.8 cm from an object

forms an image 52.5 cm from the
lens. What is the focal length of
the lens?
Unit=cm

Answer 1

13.33

Step-by-step explanation:

accellus

Answer 2

focal length = 13.33 cm

Step-by-step explanation:

1/f = 1/p + 1/q

= 1/17.8 + 1/52.5

= 0.056 + 0.019

1/f = 0.075

do

f=1/0.075

f= 13.33 cm