Question: (c) A laboratory technician is going to perform a diffraction grating experiment, in which a monochromatic light beam with a wavelength of 450 nm will

(c) A laboratory technician is going to perform a diffraction grating experiment, in which a monochromatic light beam with a wavelength of 450 nm will be illuminated normally on a diffraction grating with a separation distance of 400 lines/mm between successive lines. (i) Determine the total number of observable bright fringes. (6 marks) (ii) Comment on the change in the total number of observable bright fringes if the experiment were repeated with the same wavelength but a diffraction grating with lower number of lines per mm. (2 marks)

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