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Q.38

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Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Found in: Page 1018

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Short Answer

| 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’re 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’s 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?

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Step by Step Solution

Part (a) Step 1 Given Information 

Need to for the objective and for the Eyepiece

Part (b) Step 2 Calculation 

It will be the magnification of your telescope

Part (c) Step 3 Simplifies 

The two lenses be when you focus on distant objects

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