Question

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 $5\text{X}$ before his eyes. The angular magnification achieved is

• A. $5$
• B. $2.5$
• C. $1$
• D. $0.2$

Answer 1

The correct option is C $1$

Angular magnification of a simple microscope is,

$m=\frac{D}{|u|}$

Where,
$D:$ near point distance,
$|u|:$ object distance from lens.

Since, position of eye or object is not altered.

$\Rightarrow |u|=D$

$\therefore m=\frac{D}{D}=1$

Hence, $\left(C\right)$ is the correct answer.