An object 15cm high is 30cm from pin-hole camera. If the height of the image formed at the back of the camera is 10cm, the image distance is
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Correct Answer: Option A
Explanation:
\(\frac{\text{image height}}{\text{object height}}\) = \(\frac{\text{image distance}}{\text{object distance}}\)
\(\frac{10}{15}\) = \(\frac{\text{image distance}}{30}\)
image distance = 20cm
\(\frac{\text{image height}}{\text{object height}}\) = \(\frac{\text{image distance}}{\text{object distance}}\)
\(\frac{10}{15}\) = \(\frac{\text{image distance}}{30}\)
image distance = 20cm