(a) How far from grains of red sand must you be to positionyourself just at the limit of resolving the grains if your pupil diameteris 1.5 mm, the grains are spherical with radius 50 mm, and thelight from the grains has wavelength 650 nm? (b) If the grains wereblue and the light from them had wavelength 400 nm, would theanswer to (a) be larger or smaller?

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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(a) How far from grains of red sand must you be to position
yourself just at the limit of resolving the grains if your pupil diameter
is 1.5 mm, the grains are spherical with radius 50 mm, and the
light from the grains has wavelength 650 nm? (b) If the grains were
blue and the light from them had wavelength 400 nm, would the
answer to (a) be larger or smaller?

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