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Chapter 35: Q. 15 (page 1017)

A microscope has a 20cmtube length. What focal-length objective will give total magnification localid="1649845070556" 500脳when used with an eyepiece having a focal length 5.0cm?

Short Answer

Expert verified

The objective will give a total magnification 500脳is 0.2cm.

Step by step solution

01

Given Information.

We have given that:

Tube lengthL=20cm,

Magnification localid="1649845198764" M=500脳

Focal length feye=5cm

We need to find the focal length.

02

Simplification.

As we know a total magnification microscope:

M=-Lfobj脳25feye500=20fobj脳255500=20fobj脳5500=100fobjfobj=100500fobj=0.2cm

Here fobjis the focal length of an object and Mis magnification.

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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 red card is illuminated by red light. What color will the card appear? What if it鈥檚 illuminated by blue light?

The Hubble Space Telescope has a mirror diameter of 2.4 m. Suppose the telescope is used to photograph stars near the center of our galaxy, 30,000 light years away, using red light with a wavelength of 650 nm.

a. What鈥檚 the distance (in km) between two stars that are marginally resolved? The resolution of a reflecting telescope is calculated exactly the same as for a refracting telescope.

b. For comparison, what is this distance as a multiple of the distance of Jupiter from the sun?

The rays leaving the two-component optical system of FIGUREP35.27produce two distinct images of the1.0cm-tall object. what are the position (relative to the lens), orientation, and height of each image?

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.
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