A small telescope has an objective lens of a focal length \(144~\text{cm}\)  and an eyepiece of focal length \(6.0~\text{cm}.\) What is the magnifying power of the telescope?

A giant refracting telescope at an observatory has an objective lens of focal length \(15\) m. If an eyepiece of focal length \(1.0\) cm is used, what is the angular magnification of the telescope?

A small telescope has an objective lens of a focal length 140 cm and an eyepiece of focal length 5.0 cm. What is the magnifying power of the telescope for viewing distant objects when the telescope is in normal adjustment (i.e., when the final image is at infinity)?

1. 26
2. 32
3. 28
4. 30

An angular magnification (magnifying power) of \(30\mathrm{X}\) is desired using an objective of focal length \(1.25~\text{cm}\) and an eyepiece of focal length \(5~\text{cm}\). The separation between the objective lens and the eyepiece should be:
1. \(11.67~\text{cm}\)
2. \(10.23~\text{cm}\)
3. \(12.21~\text{cm}\)
4. \(13.13~\text{cm}\)