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.
Over 30 million students worldwide already upgrade their learning with Vaia!
All the tools & learning materials you need for study success - in one app.
Get started for free
A diffraction-limited lens can focus light to a 10diameter spot on a screen. Do the following actions make the spot diameter larger, make it smaller, or leave it unchanged?
A. Decreasing the wavelength of the light.
B. Decreasing the lens diameter.
C. Decreasing the lens focal length.
D. Decreasing the lens-to-screen distance.
A common optical instrument in a laser laboratory is a beam expander. one type of beam expander is shown in FIGURE P.
a. For what lens spacing d does a parallel laser beam exit from
the right?
b. What is the width of the exiting laser beam?
Suppose you wanted special glasses designed to let you see underwater without a face mask. Should the glasses use a converging or diverging lens? Explain.
The resolution of a digital camera is limited by two factors:
diffraction by the lens, a limit of any optical system, and the fact
that the sensor is divided into discrete pixels. Consider a typical
point-and-shoot camera that has a 20-mm-focal-length lens and
a sensor with 2.5@mm@wide pixels.
a. First,ass ume an ideal, diffractionless lens. At a distance of
100 m, what is the smallest distance, in cm, between two
point sources of light that the camera can barely resolve? In
answering this question, consider what has to happen on the
sensor to show two image points rather than one. You can use
s′ = f because s W f.
b. You can achieve the pixel-limited resolution of part a only if
the diffraction width of each image point is no greater than
1 pixel in diameter. For what lens diameter is the minimum
spot size equal to the width of a pixel? Use 600 nm for the
wavelength of light.
c. What is the f-number of the lens for the diameter you found in
part b? Your answer is a quite realistic value of the f-number
at which a camera transitions from being pixel limited to
being diffraction limited. For f-numbers smaller than this
(larger-diameter apertures), the resolution is limited by the
pixel size and does not change as you change the aperture. For
f-numbers larger than this (smaller-diameter apertures), the
resolution is limited by diffraction, and it gets worse as you
“stop down” to smaller apertures
A beam of white light enters a transparent material. Wavelengths for which the index of refraction is n are refracted at angle .
Wavelengths for which the index of refraction is n + , where , are refracted at angle .
a). Show that the angular separation of the two wavelengths, in radians, is .
b). A beam of white light is incident on a piece of glass at 30.0°. Deep violet light is refracted 0.28° more than deep red light. The index of refraction for deep red light is known to be 1.552. What is the index of refraction for deep violet light?
What do you think about this solution?
We value your feedback to improve our textbook solutions.
