In an experimental setup, three equally spaced and equal-intensity coherent sources of red light: L₁, L₂, and L₃ are placed in a line. Using the phasor method and phase difference of $\delta$ = $\frac{2\pi\cdot d\cdot\sin\left(\theta\right)}{\lambda}$, determine the locations of the maxima "θ_max" in the interference pattern.

• A. $\theta _{\max }=\arcsin \left(\frac{m\lambda }{2d}\right),\ m=0,1,2,\ldots$
• B. $\theta _{\max }=\arcsin \left(\frac{m\lambda }{d}\right),\quad m=0,1,2,\ldots$
• C. $\theta _{\max }=\arcsin \left(\frac{2m\lambda }{d}\right),\quad m=0,1,2,\ldots$
• D. $\theta _{\max }=\arcsin \left(\frac{4m\lambda }{d}\right),\ m=0,1,2,\ldots$

Answer: (B)