Physics
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1). A piece of curved glass has a radius of curvature of r = 10.0 m and is used to form Newton's ring. Not counting the dark spot at the center of the pattern, there are one hundred dark fringes, the last one being at the outer edge of the curved piece of glass. The light being used of 654 nm in vacuum. What is the radius R of the outermost ring in the pattern?
2) The light shone on a diffraction grating has a wavelength of 495 nm(in vacuum). The grating produces a second-order bright fringes whose position is defined by an angle of 9.34 Degrees. How many lines per centimeter does the grating have?
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