(Solved): please show work Thx Question The angular dispersion of a diffraction grating \( (\Delta \phi / \De ...

please show work Thx

Question The angular dispersion of a diffraction grating \( (\Delta \phi / \Delta \lambda) \) is a measure of the angular separation of adjacent wavelengths. Calculate the dispersion of a first-order diffraction for light emerging at \( \phi=23^{\circ} \) when a grating with 1,800 grooves per centimeter is used. degrees/um. (Remember pi radians \( =180 \) degrees)