WAEC - Physics (2008 - No. 28)
A converging lens and a screen are placed 20 cm and 80 cm respectively from an object in a straight line so that a sharp image of the object is formed on the screen. If the object is 3cm high. Calculate the height of the image formed
1 cm
9cm
12cm
15cm
Giải thích
\(\frac{v}{u} = \frac{hi}{ho} = \frac{60}{20} = \frac{hi}{3}\)
hi = 9cm
hi = 9cm