A triple slit experiment (with$$ basic conditions similar to a $$YDSE) is performed as shown in the figure with monochromatic light of amplitude $$a0$$. Consider light waves from $$S1$$, $$S2$$, $$S3$$ reaching a point P (shown$$ by straight $$lines) on screen. $$S2M$$, $$S1N$$ are perpendicular to $$S3P$$, $$S2P$$ respectively. $$S3M$$≈$$S2N=$$δ . The graph between resultant amplitude of light (A) versus δ is plotted. Choose the CORRECT graph between options (A) and (B) and appropriate relation between $$A10$$ and $$A20$$ between options (C) and (D).

Question

A triple slit experiment (with$$ basic conditions similar to a $$YDSE) is performed as shown in the figure with monochromatic light of amplitude $$a0$$. Consider light waves from  $$S1$$,  $$S2$$,  $$S3$$ reaching a point P (shown$$ by straight $$lines) on screen. $$S2M$$,  $$S1N$$  are perpendicular to  $$S3P$$,  $$S2P$$ respectively.  $$S3M$$≈$$S2N=$$δ . The graph  between  resultant  amplitude of light (A) versus  δ  is  plotted.  Choose the CORRECT graph between options (A) and (B) and appropriate relation between  $$A10$$ and  $$A20$$ between options (C) and (D).

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