1-Two slits are placed 0.2 mm apart and project an intereference pattern on a screen which is 1 meter away. If the distance between the central and the 3rd fringe is 7.5 mm on the screen what is the wavelength of the light used?
2-In a double slit experiment where light of wavelength of 0.00006 cm is used, the distance of the screen from the slits is 1.0 meter and the slit separation is 0.1 mm. What is the spacing between the first and 2nd fringes?
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