Entoptic halos. If someone looks at a bright outdoor lamp in otherwise dark surroundings, the lamp appears to be surrounded by bright and dark rings (hence halos) that are actually a circular diffraction pattern , with the central maximum overlapping the direct light from the lamp. The diffraction is produced by structures within the cornea or lens of the eye (hence entoptic). If the lamp is monochromatic at wavelength 550 nm and the first dark ring subtends angular diameter 2.5° in the observer’s view, what is the (linear) diameter of the structure producing the diffraction?
Entoptic halos. If someone looks at a bright outdoor lamp in otherwise dark surroundings, the lamp appears to be surrounded by bright and dark rings (hence halos) that are actually a circular diffraction pattern , with the central maximum overlapping the direct light from the lamp. The diffraction is produced by structures within the cornea or lens of the eye (hence entoptic). If the lamp is monochromatic at wavelength 550 nm and the first dark ring subtends angular diameter 2.5° in the observer’s view, what is the (linear) diameter of the structure producing the diffraction?
Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter35: Diffraction And Interference
Section: Chapter Questions
Problem 68PQ
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Entoptic halos. If someone looks at a bright outdoor lamp
in otherwise dark surroundings, the lamp appears to be surrounded
by bright and dark rings (hence halos) that are actually a circular diffraction
pattern , with the central maximum overlapping
the direct light from the lamp. The diffraction is produced by
structures within the cornea or lens of the eye (hence entoptic). If the
lamp is monochromatic at wavelength 550 nm and the first dark ring
subtends angular diameter 2.5° in the observer’s view, what is the
(linear) diameter of the structure producing the diffraction?
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