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In a Young's double experiment , the sli...

In a Young's double experiment , the slits are 1.5 mm apart. When the slits are illuminated by a nonochromatic light source and the screen is kept 1 m apart from the slits ,width of 10 fringes is measured as 3.93 mm . Calculated the wavelength of light used. What will be the width of 10 fringes when the distance between the slits and the screen is increased by 0.5 m . The source of light used remains the same.

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The correct Answer is:
5.9`xx10^(-7)m, 5.9xx10^(-3)m`
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