A scientist needs to focus a helium-neon laser beam (633 nm) to a 10-μm-diameter spot 8.0 cm behind the lens. ▾ Part A What focal-length lens should she use? Express your answer with the appropriate units. ▸ View Available Hint(s) f = 8.0 cm Submit Previous Answers ✓ Correct Part B What minimum diameter must the lens have? Express your answer with the appropriate units. ▸ View Available Hint(s) D= 6.182 Submit Previous Answers mm ? × Incorrect; Try Again; 8 attempts remaining Check the numerical coefficient in the expression for the minimum spot size used in your calculation

A scientist needs to focus a helium-neon laser beam (633 nm) to a 10-μm-diameter spot 8.0 cm behind the lens. ▾ Part A What focal-length lens should she use? Express your answer with the appropriate units. ▸ View Available Hint(s) f = 8.0 cm Submit Previous Answers ✓ Correct Part B What minimum diameter must the lens have? Express your answer with the appropriate units. ▸ View Available Hint(s) D= 6.182 Submit Previous Answers mm ? × Incorrect; Try Again; 8 attempts remaining Check the numerical coefficient in the expression for the minimum spot size used in your calculation

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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