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A screen is placed 2.1 m away from a diffraction grating of 555 lines/cm. The second- order bright fringe is measured to be 10.0

A screen is placed 2.1 m away from a diffraction grating of 555 lines/cm. The second- order bright fringe is measured to be 10.0 cm from the central bright fringe. a. Determine the wavelength of the light. [3 marks] b. Find the angle from the central bright fringe to the first bright fringe. [2 marks]

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