Question: The light from an iron arc includes many different wavelengths. Two of these are at = 587.9782 nm and = 587.8002nm. You wish to resolve

The light from an iron arc includes many different wavelengths. Two of these are at λ = 587.9782 nm and λ = 587.8002nm. You wish to resolve these spectral lines in first order using a grating 1.20 cm in length. What minimum number of slits per centimeter must the grating have?

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