Two coherent point sources S₁ and S₂ of wavelength 600 nm are placed in the x-y plane as shown, while the screen is parallel to the x-z plane at D=3 m. Source separation is d=0.6003 mm. Which statements about the screen intensity pattern are correct?

Question

G1 Physics · Accepted Answer

Equal-path-difference loci on the misplaced screen are semicircles centered at O, so B is true. At O, d/λ=0.6003 mm/600 nm=1000.5, a half-integer, so the region near O is dark; C is true. Correct: B,C.