With two slits spaced 0.2 mm apart and a screen at a distance of 1 m, the third bright fringe is found to be at 7.5 mm from the central fringe. The wavelength of light used isA. `400 nm`B. `500 nm`C. `550 nm`D. `600 nm`

With two slits spaced 0.2 mm apart and a screen at a distance of 1 m,

1.	With two slits spaced 0.2 mm apart and a screen at a distance of 1 m, the third bright fringe is found to be at 7.5 mm from the central fringe. The wavelength of light used isA. `400 nm`B. `500 nm`C. `550 nm`D. `600 nm`
Answer» Correct Answer - B `y = (n lambda D)/(d)`

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With two slits spaced 0.2 mm apart and a screen at a distance of 1 m, the third bright fringe is found to be at 7.5 mm from the central fringe. The wavelength of light used isA. `400 nm`B. `500 nm`C. `550 nm`D. `600 nm`

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