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a finds an unlabeled box of fine needles, and wants to determine how thick they are. dle is less than a millimeter thick. So, to find the thickness, she uses a needle to pok er. Then, she positions a 670 nm laser pointer to shine through the hole and project 7 m away. She then uses her ruler to measure that the central bright circle is 15.7 cm ulate for the needle?

a finds an unlabeled box of fine needles, and wants to determine how thick they are. dle is less than a millimeter thick. So, to find the thickness, she uses a needle to pok er. Then, she positions a 670 nm laser pointer to shine through the hole and project 7 m away. She then uses her ruler to measure that the central bright circle is 15.7 cm ulate for the needle?

College Physics
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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Irina finds an unlabeled box of fine needles, and wants to determine how thick they are. A standard ruler will not do the job, as each needle is less than a millimeter thick. So, to find the thickness, she uses a needle to poke a hole in a piece of brown construction paper. Then, she positions a 670 nm laser pointer to shine through the hole and project a circular diffraction pattern on a wall 21.7 m away. She then uses her ruler to measure that the central bright circle is 15.7 cm in diameter. What diameter does Irina calculate for the needle? diameter: um
Transcribed Image Text:Irina finds an unlabeled box of fine needles, and wants to determine how thick they are. A standard ruler will not do the job, as each needle is less than a millimeter thick. So, to find the thickness, she uses a needle to poke a hole in a piece of brown construction paper. Then, she positions a 670 nm laser pointer to shine through the hole and project a circular diffraction pattern on a wall 21.7 m away. She then uses her ruler to measure that the central bright circle is 15.7 cm in diameter. What diameter does Irina calculate for the needle? diameter: um
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