Question
Define the magnification produced by a lens. Explain it in brief.
✓
Answer
The magnification produced by a lens is defined as the ratio of the height of the image to the height of the object.
→ It is represented by the letter m.
→ If h is the height of the object and h' is the height of the image formed (given) by a lens, then the magnification produced by the lens is given by
$m=\frac{\text { Height of the image }}{\text { Height of the object }}=\frac{h^{\prime}}{h}$ .....(9.16)
→Magnification produced by a lens is also related to the object distantce u and the image distance v. This relationship is given by
Magnification $m=\frac{h^{\prime}}{h}-\frac{v}{u}$ .....(9.17)
→ It is represented by the letter m.
→ If h is the height of the object and h' is the height of the image formed (given) by a lens, then the magnification produced by the lens is given by
$m=\frac{\text { Height of the image }}{\text { Height of the object }}=\frac{h^{\prime}}{h}$ .....(9.16)
→Magnification produced by a lens is also related to the object distantce u and the image distance v. This relationship is given by
Magnification $m=\frac{h^{\prime}}{h}-\frac{v}{u}$ .....(9.17)
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