A man is looking at a small object placed at his near point. With… - Vidyadip

MCQ

A man is looking at a small object placed at his near point. Without altering the position of his eye or the object, he puts a simple microscope of magnifying power $5X$ before his eyes. The angular magnification achieved is:

A
$5$
B
$2.5$
✓
$1$
D
$0.2$

✓

Answer

Correct option: C.

$1$

We have,

$h =$ Object height
$u =$ Object distance $= 25cm$
$D =$ Near point $= 25cm$
Now,
$\text{m}=\frac{\frac{\text{h}}{\text{u}}}{\frac{\text{h}}{\text{D}}}$
$\Rightarrow\text{m}=\frac{\frac{\text{h}}{25}}{\frac{\text{h}}{25}}$
$\Rightarrow \text{m}=1$

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