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constructive: $d \sin \theta = \lambda \left( m - \dfrac{1}{2} \right), m=1,2,3,...$
destructive: $d \sin \theta = m \lambda, m = 0,1,2,3,...$
The interference pattern is reversed.

Giancoli 7th Global Edition, Chapter 24, Problem 11

(3:19)

Chapter 24, Problem 11 is solved.

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