In the figure is shown Young’s double slit experiment. Q is the position of the first bright fringe on the right side of O. P is the 11th fringe on the other side, as measured from Q. If the wavelength of the light used is 6000 × 10–10 m, then S1B will be equal to 

(1) 6 × 10–6 m

(2) 6. 6 × 10–6 m

(3) 3.138 × 10–7 m

(4) 3.144 × 10–7 m

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