In a Young's double slit experiment, the difference in optical path lengths between the rays starting from the two slits S₁ and S₂ and reaching a point a on the screen is 0.0075 mm and reaching another point B on the screen on the other side of the central fringe is 0.0015 mm. How many bright and dark fringes are observed between A and B if the wavelength of light used is 6000Å ? - VgyanHub

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Example 7.4: In a Young’s double slit experiment, the difference in optical path lengths between the rays starting from the two slits S₁ and S₂ and reaching a point a on the screen is 0.0075 mm and reaching another point B on the screen on the other side of the central fringe is 0.0015 mm. How many bright and dark fringes are observed between A and B if the wavelength of light used is 6000Å ?

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