A converging lens and a screen are placed 20 cm and 80 cm respectively from
PHYSICS
WAEC 2008
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
- A. 1 cm
- B. 9cm
- C. 12cm
- D. 15cm
Correct Answer: B. 9cm
Explanation
\(\frac{v}{u} = \frac{hi}{ho} = \frac{60}{20} = \frac{hi}{3}\)
hi = 9cm
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