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Chapter 35: Q. 16 (page 1017)

A standardized biological microscope has an 8.0mmfocal length objective. what focal-length eyepiece should be used to achieve a total magnification of100x?

Short Answer

Expert verified

5cm the focal-length eyepiece should be used to achieve a total magnification of100x.

Step by step solution

01

Given Information

We need to find out the focal length of the eyepiece.

02

Simplification

L=160mm

role="math" localid="1648728454541" M=100

fobj=8mm

As we know that the total magnification in the microscope is:

M=-Lfobj脳25feye

100=1608脳25feye

feye=20脳25100

feye=500100

feye=5cm.

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Most popular questions from this chapter

Alpha Centauri, the nearest star to our solar system is 4.3light years away. assume that alpha centauri has a planet with an advanced civilization. professor Dhg, at the planet's Astronomical Institute, wants to build a telescope with which he can find out whether any planets are orbiting our sun.

(a). What is the minimum diameter for an objectives lens that will just barely resolve Jupiter and the sun? The radius of Jupiter's orbit is 780millionkm.Assume 位=600nm.

(b). Building a telescope of the necessary size does not appear to be a major problem. What practical difficulties might prevent professor Dhg's experiment from succeeding?

A 2.0mtall man is 10min front of a camera with a 15mmfocal length lens. How tall is his image on the detector?

A 2.0-cm-tall object is 20cmto the left of a lens with a focal length of10cmA second lens with a focal length of 15cmis30cmto the right of the first 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.

Two converging lenses with focal lengths of 40 cm and 20 cm are 10 cm apart. A 2.0-cm-tall object is 15 cm in front of the 40-cm-focal-length 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.

You鈥檝e 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?
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