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19. A double slit source is at a distance of 1.3 m away from a screen. The slits are
separated by 3.0 x 105 m from each other. The second order bright fringe is observed
5.9 x 10-² m from the centre line. Determine the wavelength of the light.
A) 453 nm
B) 560 nm
C) 681 nm
D) 700 nm
E) 740 nm

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