Chapter 26: Q17PE (page 956)
Repeat the previous problem for eyeglasses held 1.50 cm from the eyes.
Short Answer
The power of vision of a myopic man must be reduced (corrected) by 5.41 D.
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Chapter 26: Q17PE (page 956)
Repeat the previous problem for eyeglasses held 1.50 cm from the eyes.
The power of vision of a myopic man must be reduced (corrected) by 5.41 D.
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A 7.5binocular produces an angular magnification of-7.50 , acting like a telescope. (Mirrors are used to make the image upright.) If the binoculars have objective lenses with a 75.0cm focal length, what is the focal length of the eyepiece lenses?
An amoeba is 0.305 cm away from the 0.300 cm focal length objective lens of a microscope. (a) Where is the image formed by the objective lens? (b) What is this image’s magnification? (c) An eyepiece with a 2.00 cm focal length is placed 20.0 cm from the objective. Where is the final image? (d) What magnification is produced by the eyepiece? (e) What is the overall magnification? (See Figure 26.16.)
What is color constancy, and what are its limitations?
Why not have the objective of a microscope form a case 2 image with a large magnification? (Hint: Consider the location of that image and the difficulty that would pose for using the eyepiece as a magnifier.)
A microscope with an overall magnification of 800 has an objective that magnifies by 200.
(a) What is the magnification of the eyepiece?
(b) If there are two other objectives that can be used, having magnifications of 100 and 400, what other total magnifications are possible?
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