An object 3.0cm high is placed 60.0cm from a converging lens whose focal length is 20.0cm. Calculate the size of the image formed

An object 3.0cm high is placed 60.0cm from a converging lens whose focal length is 20.0cm. Calculate the size of the image formed

Answer Details

F = $\frac{UV}{U+V}$

20 = $\frac{60\times V}{60+V}$

V = 30cm

similarly, $\frac{U}{V}$ = $\frac{\text{height of object}}{\text{height of image}}$

$\frac{60}{30}$ = $\frac{3}{h}$

h = 1.5cm