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Chapter 35: Q.38 (page 1018)

| Marooned on a desert island and with a lot of time on your hands, you decide to disassemble your glasses to make a crude telescope with which you can scan the horizon for rescuers. Luckily you鈥檙e farsighted, and, like most people, your two eyes have different lens prescriptions. Your left eye uses a lens of power +4.5 D, and your right eye鈥檚 lens is +3.0 D. a. Which lens should you use for the objective and which for the eyepiece? Explain.

b. What will be the magnification of your telescope?

c. How far apart should the two lenses be when you focus on distant objects?

Short Answer

Expert verified

Need to for the objective and for the Eyepiece

Step by step solution

01

Part (a) Step 1 Given Information 

Need to for the objective and for the Eyepiece

02

Part (b) Step 2 Calculation 

It will be the magnification of your telescope

03

Part (c) Step 3 Simplifies 

The two lenses be when you focus on distant objects

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