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Question
(a) Find the angle between the first minima for the two sodium vapor lines, which have wavelengths of 589.1 and 589.6 nm, when they fall upon a single slit of width $2.00 \textrm{ }\mu\textrm{m}$. (b) What is the distance between these minima if the diffraction pattern falls on a screen 1.00 m from the slit? (c) Discuss the ease or difficulty of measuring such a distance.
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Final Answer
  1. $0.0150^\circ$
  2. $287 \textrm{ }\mu\textrm{m}$
  3. This distance would be difficult to measure with the unaided eye, but easily measured using a magnifying glass.
Solution Video

OpenStax College Physics Solution, Chapter 27, Problem 51 (Problems & Exercises) (4:22)

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