Chapter 11.3, Problem 1bT

In a previous homework, you found an expression for $\Delta D$ in terms of d and $\theta$ that was valid for points far from two point sources. Using that expression, write equations (in terms of $\lambda$ , $\theta$ , and d) that you can use to calculate the angle(s) for which there will be:

• maximum constructive interference (i.e., a maximum)
• complete destructive interference (i.e., a minimum)