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| Numerical - 15 |
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| 15. Sodium light l = 589 nm is incident on a Young's double slit experiment. The separation between the two slits is 3.0 mm. If the screen is placed at a distance of 4m from the slits, locate the position of the tenth bright fringe on the screen. |
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| Suggested solution: |
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| The distance xn of the nth bright from the central fringe, in Young's experiment is |
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| Given n = 10: l = 589 10-9m: D=4m d= 2 10-13 |
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| = 0.01178 m |
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| = 1.178cm |
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