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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?

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Part (a) step1 : Given Information

Simplify the objective lens viewing with a relaxed eye

Part (a) Step 2 : Calculation

Part (b) Step 1 : Given Information

The magnification of microscope

Part (b) Step 2 : Simplify

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Most popular questions from this chapter

A reflection telescope is build with a $20 c m$ diameter mirror having a $1.00 m$ focal length. it is used with a $10 X$ eyepiece. what are

(a) the magnification and

(b) the $f - n u m b e r$ of the telescope?

You’ve been asked to build a telescope from a $2.0 x$ magnifying lens and a $5.0 x$ magnifying 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?

A converging lens with a focal length of $40 c m$ and a diverging lens with a focal length of $- 40 c m$ are $160 c m$ apart. A $2 c m$ tall object is $60 c m$ in front of the converging lens.

a. Use ray tracing to find the position and height of the image. Do this accurately using a ruler or paper with a grid, then make measurements on your diagram.

b. Calculate the image position and height. Compare with your ray-tracing answers in part a.

Modern microscopes are more likely to use a camera than human viewing. This is accomplished by replacing the eyepiece in Figure 35.14 with a photo-ocular that focuses the image of the objective to a real image on the sensor of a digital camera. A typical sensor is 22.5 mm wide and consists of 5625 4.0@mm@ wide pixels. Suppose a microscopist pairs a 40* objective with a 2.5* photo-ocular.

a. What is the field of view? That is, what width on the microscope stage, in mm, fills the sensor?

b. The photo of a cell is 120 pixels in diameter. What is the cell’s actual diameter, in mm?

A microscope has a $20 c m$ tube length. What focal-length objective will give total magnification localid="1649845070556" $500 \times$ when used with an eyepiece having a focal length $5.0 c m$ ?

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Short Answer

Step by step solution

Part (a) step1 : Given Information

Part (a) Step 2 : Calculation

Part (b) Step 1 : Given Information

Part (b) Step 2 : Simplify

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Most popular questions from this chapter

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