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.
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