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An object 4 cm tall is placed in front of a concave mirror. If the magnification produced is -2, find the height of the image.
Answers (1)
Using a formula,
$$
\text { Magnification }(m)=\frac{h_2}{h_1}
$$
here $h_1 \rightarrow$ object height, $h_2 \rightarrow$ image height
Given data in the question:
- Object height (h1) = 4 cm
- Magnification (m) = -2
Putting values in the formula,
$\begin{aligned} & -2=\frac{h_2}{4} \\ & h_2=-8 \mathrm{~cm}\end{aligned}$
The height of the image is 8 cm, and the negative sign indicates that the image is inverted.
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