In Young's double-slit experiment, the slits are 0.2 mm apart and the screen is 1.5 m away.The distance between the central bright fringe and the fourth dark fringe is 1.8 cm.Find the wavelength of light used.

6898 ˚ A

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8960 ˚ A

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6060 ˚ A

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6860 ˚ A

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The correct option is D $6860 ˚ A$

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In Young's double-slit experiment, the slits are 0.2 mm apart and the screen is 1.5 m away.The distance between the central bright fringe and the fourth dark fringe is 1.8 cm.Find the wavelength of light used.

The correct option is D 6860˚A

The correct option is D $6860 ˚ A$