What is the purpose of a simple magnifier?

Where should an object be placed relative to a converging lens used as a magnifier?

What type of image does a simple magnifier produce?

State the relaxed-eye angular magnification of a simple magnifier.

State the near-point angular magnification of a simple magnifier.

A magnifier has \(f=5.0\,\mathrm{cm}\). Find the relaxed-eye angular magnification using \(N=25\,\mathrm{cm}\).

For the magnifier in question 6, find the near-point angular magnification.

Why does a shorter focal length give a stronger magnifier?

Find the focal length needed for a relaxed-eye magnification of \(10\times\). Use \(N=25\,\mathrm{cm}\).

A magnifier has power \(+20\,\mathrm{D}\). Find its focal length.

For the \(+20\,\mathrm{D}\) magnifier in question 10, find the relaxed-eye angular magnification.

Why is angular magnification more useful than lateral magnification for a magnifier?

When a magnifier is adjusted for a relaxed eye, where is the final image?

For relaxed viewing, where is the object placed relative to the focal point?

A magnifier has \(f=10\,\mathrm{cm}\). Compare relaxed-eye and near-point magnifications.

Why can a magnifier produce an enlarged virtual image even though a screen cannot catch it?

A magnifier gives near-point angular magnification \(8.0\). Find its focal length using \(N=25\,\mathrm{cm}\).

What limits the useful magnification of a simple magnifier in practice?

A simple magnifier is made stronger by decreasing \(f\). What happens to its optical power?

Explain why the standard magnifier formulas use the near point \(N\).