In a Young' s experiment, two coherent sources are placed 0.90 mm apart and the fringes are observed one metre away. If it produces the second dark fringe at a distance of 1 mm from the central fringe, the wvaelength of monochormatic light used would be :

In a Young' s experiment, two coherent sources are placed 0.90 mm apar

1.	In a Young' s experiment, two coherent sources are placed 0.90 mm apart and the fringes are observed one metre away. If it produces the second dark fringe at a distance of 1 mm from the central fringe, the wvaelength of monochormatic light used would be :
Answer» `60 xx 10^(-4) cm` `10 xx 10^(-4) cm` `10 xx 10^(-5) cm` `6 xx 10^(-5) cm` Solution :`x = (2n - 1) (LAMBDA)/(a).(D)/(2)` then `lambda = 6 xx 10^(-5)` cm.

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In a Young' s experiment, two coherent sources are placed 0.90 mm apart and the fringes are observed one metre away. If it produces the second dark fringe at a distance of 1 mm from the central fringe, the wvaelength of monochormatic light used would be :

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