An object which is 3cm high is placed vertically 10cm in front of a concave...
PHYSICS
JAMB 1990
An object which is 3cm high is placed vertically 10cm in front of a concave mirror. If this object produces an image 40cm from the mirror, the height of the image is
- A. 0.75cm
- B. 4.00cm
- C. 8.00cm
- D. 12.00cm
Correct Answer: D. 12.00cm
Explanation
\(\frac{\text {object height}}{\text{image height}}\) = \(\frac{\text {object distance}}{\text{image distance}}\)
\(\frac{3}{\text{image height}}\) = \(\frac{10}{40}\)
Image height = 12cm
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