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Ray Optics and Optical Instruments — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsRay Optics and Optical Instruments2 Marks
Question
Is the magnification equal to the magnifying power in this case? Explain.
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Answer

Near point, D = 25 cm
Distance where the object is kept, u = 7.14 cm
Magnifying power of the lens, $\text{m}=\frac{\text{D}}{\text{u}}$
$=\frac{25}{7.14}$
= 3.5
Here, in this case since the image is formed at the least distance of distinct vision, the magnifying power is equal to the magnitude of magnification.

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