Question

To increase the angular magnification of a simple microscope, one should increase ______.

Options

• the focal length of the lens

•  the power of the lens

• the aperture of the lens

• the object size

Answer 1

To increase the angular magnification of a simple microscope, one should increase the power of the lens.

Explanation:

For a simple microscope in normal adjustment, the object is placed at a distance equal to f (the ​focal length) from the lens, and the angular magnification is given by the relation

m = `"D"/"F"`

For u < f, m = `"D"/"f" + 1`

Power of the lens = `1/"f"`

Angular magnification depends on power.