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: Option D
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