Light passes through a 230 lines/mm grating and is observed on a 1.4-{rm m}-wide screen located 1.4 m behind the grating. Three bright fringes are…

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Light passes through a 230 lines/mm grating and is observed on a 1.4-{rm m}-wide screen located 1.4 m behind the grating. Three bright fringes are seen on both sides of the central maximum.Max wavelength and Min wavelength?

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