A pinhole camera is placed 300m in front of a building so that the image is formed on a screen 5cm from the the pinhole. If the image is 2.5cm high, the height of the building will be
- 25m
- 50m
- 100m
-
150m
The correct answer is: D
Explanation
==> \(\frac{v}{u}\) = \(\frac{hi}{ho}\)==> \(\frac{5}{300}\) = \(\frac{2.5}{ho}\)
= 150m
There is an explanation video available .