Question: 1. What is the equation that relates the diffraction angle 0, line spacing d, interference-order n, and wavelength of light 1 for a diffraction grating

$1. What is the equation that relates the diffraction angle 0,$

1. What is the equation that relates the diffraction angle 0, line spacing d, interference-order n, and wavelength of light 1 for a diffraction grating spectrometer (look-up your favourite source of reliable physics information or derive it yourself)? 2. For a transmission diffraction grating ruled with 4000 lines/cm, calculate the first-order constructive interference angle for light of wavelength 440 nm

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