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Chapter 35: Q. 40 (page 1018)

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?

Short Answer

Expert verified

That is, what width on the microscope stage, in mm

Step by step solution

01

Part (a) step 1 Given Information

That is, what width on the microscope stage, in mm

02

part (b) step 2 Calculation

The photo of a cell is 120 pixels in diameter.

03

part (c) step 3 Simplify 

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Most popular questions from this chapter

A common optical instrument in a laser laboratory is a beam expander. One type of beam expander is shown in FIGURE P35.29.

The parallel ray of a laser beam of width ω1enter from the left.

a. For what lens spacing d does a parallel laser beam exit from the right?

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A reflection telescope is build with a 20cmdiameter mirror having a 1.00mfocal length. it is used with a 10Xeyepiece. what are

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FIGURE CP35.50shows a simple zoom lens in which the magnitudes of both focal lengths are f. If the spacing d<f, the image of the converging lens falls on the right side of the diverging lens. Our procedure of letting the image of the first lens act as the object of the second lens will continue to work in this case if we use a negative object distance for the second lens. This is called a virtual object. Consider an object very far to the left (s≈∞)of the converging lens. Define the effective focal length as the distance from the midpoint between the lenses to the final image.

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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 +4.5Dand your right eye’s lens is +3.0D. a. Which lens should you use for the objective and which for the eyepiece? Explain.

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