Two coherent point sources S₁ and S₂ vibrating in phase emit light of wavelength λ. The separation between the sources is 2λ. Consider a line passing through S₂ and perpendicular to the line S₁S₂. Find the position of nearest minima.
a. D = λ/2
b. D = (5λ)/12
c. D = (7λ)/12
d. D = λ/3