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Chapter 35: Q.13 (page 1017)

What is the f-number of a relaxed eye with the pupil fully dilated to 8.0mm? model the eye as a single lens 2.4 cm in front of the retina

Short Answer

Expert verified

The potential difference is11.4v.

Step by step solution

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01

Given information 

Let the electrons accelerate from the pointto the rest of the pointwhere it reaches the speedof m/s. The conversation of energy says

02

Step 2. Explanation

Step 2: Explanation

This yield is

The potential difference is related to the potential energy difference throughelectrons

which yield is

03

Step 3. Substitution

By substituting the equation,k

We have to find

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Most popular questions from this chapter

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

(a) the magnification and

(b) the f-numberof the telescope?

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.

A 2.0-tall object is 20cmto the left of a lens with a focal length of 10cm. A second lens with a focal length of -5cm is 30cm to 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.

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.

b. What will be the magnification of your telescope?

c. How far apart should the two lenses be when you focus on distant objects?

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

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