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     EduGorilla 
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    A monochromatic light source of wavelength λ is placed at S. Three slits S1, S2 and S3 are equidistant from the source S and the point P on the screen. S1P-S2P=λ/6 and S1P-S3P = 2λ/3. If I be the intensity at P when only one slit is open, the intensity at P when all the three slits are open is 

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    1. 3I

    2. 5I

    3. 8I

    4. zero

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Reply To: A monochromatic light source of wavelength λ is placed at S. Three slits S1, S2 and S3 are equidist….
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