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
-
A.
0.5cm -
B.
1.5cm -
C.
2.0cm -
D.
6.0cm
Correct Answer: Option B
Explanation
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