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Chapter 35: Q. 13 (page 1017)
what is the of a relaxed eye with the pupil fully dilated to localid="1648735653936" ? model the eye as a single lens localid="1648735646217" in front of the retina.
is theof a relaxed eye with the pupil fully dilated to.
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The center of the galaxy is filled with low-density hydrogen gas that scatters light rays. An astronomer wants to take a picture of the center of the galaxy. Will the view be better using ultraviolet light, visible light, or infrared light? Explain.
Once dark adapter, the pupil of your eye is approximately diameter. The headlights of an oncoming car are apart. if the lens of your eye is diffraction-limited, at what distance are the two headlights marginally resolved? assume a wavelength of and that the index of refraction inside the eye is
(Your eye is not really good enough to resolve headlight at this distance, due both to aberrations in the lens and to the size of the receptors in your retina, but it comes reasonably close.
A common optical instrument in a laser laboratory is a beam expander. One type of beam expander is shown in FIGURE P . The parallel rays of a laser beam of width w1 enter from the left.
a. For what lens spacing d does a parallel laser beam exit from the right?
b. What is the width w2 of the exiting laser beam?
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’s 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?
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?
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