A scientist needs to focus a helium-neon laser beam ( = 633 nm) to a 10-m-diameter spot
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A scientist needs to focus a helium-neon laser beam (λ = 633 nm) to a 10-μm-diameter spot 8.0 cm behind a lens.
a. What focal-length lens should she use?
b. What minimum diameter must the lens have?
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Model Diffraction prevents focusing light to an arbitrarily small point Model the ...View the full answer
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Related Book For
Physics for Scientists and Engineers A Strategic Approach with Modern Physics
ISBN: 978-0133942651
4th edition
Authors: Randall D. Knight
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