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Chapter 35: Q. 48 (page 1019)

Your task in physics laboratory is to make a microscope from two lenses. One lens has a focal length of 2.0 cm, the other 1.0 cm. You plan to use the more powerful lens as the objective, and you want the eyepiece to be 16 cm from the objective.

a. For viewing with a relaxed eye, how far should the sample be from the objective lens?

b. What is the magnification of your microscope?

Short Answer

Expert verified

Simplify the objective lens viewing with a relaxed eye

Step by step solution

01

Part (a) step1 : Given Information 

Simplify the objective lens viewing with a relaxed eye

02

Part (a) Step 2 : Calculation

03

Part (b) Step 1 : Given Information 

The magnification of microscope

04

Part (b) Step 2 : Simplify 

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Most popular questions from this chapter

You’ve been asked to build a telescope from a 2.0xmagnifying lens and a 5.0xmagnifying lens.

a. What is the maximum magnification you can achieve?

b. Which lens should be used as the objective? Explain.

c. What will be the length of your telescope?

Once dark adapted, the pupil of your eye is approximately 7 mm in diameter. The headlights of an oncoming car are 120 cm apart. If the lens of your eye is diffraction limited, at what distance are the two headlights marginally resolved? Assume a wavelength of 600 nm and that the index of refraction inside the eye is 1.33. (Your eye is not really good enough to resolve headlights at this distance, due both to aberrations in the lens and to the size of the receptors in your retina, but it comes reasonably close.)

Suppose a camera’s exposure is correct when the lens has a focal length of 8.0 mm. Will the picture be overexposed, underexposed, or still correct if the focal length is “zoomed” to 16.0 mm without changing the diameter of the lens aperture? Explain

Once dark adapter, the pupil of your eye is approximately 7mmdiameter. The headlights of an oncoming car are 120cmapart. if the lens of your eye is diffraction-limited, at what distance are the two headlights marginally resolved? assume a wavelength of 600nmand that the index of refraction inside the eye is 1.33

(Your eye is not really good enough to resolve headlight at this distance, due both to aberrations in the lens and to the size of the receptors in your retina, but it comes reasonably close.

A microscope with a tube length of 180 mm achieves a total magnification of 800* with a 40* objective and a 20* eyepiece. The microscope is focused for viewing with a relaxed eye. How far is the sample from the objective lens?
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