Source lens Entrance slit Exit slit width,  (mm) grating Concave mirrors Focal Plane Focal Length, F (mm)

source lens Entrance slit Exit slit width,  (mm) grating Concave mirrors Focal Plane Focal Length, F (mm)

 (nm)  = slit width (mm) “Reciprocal Linear Dispersion” “Spectral Bandpass,  ”

 = slit width (mm) V Wavelength, nm D -1 ROYGBV  (nm)

 = slit width (mm) B Wavelength, nm ROYGBV D -1  (nm)

 = slit width (mm) G Wavelength, nm ROYGBV D -1  (nm)

 = slit width (mm) Y Wavelength, nm ROYGBV D -1  (nm)

 = slit width (mm) O Wavelength, nm ROYGBV D -1  (nm)

 = slit width (mm) R Wavelength, nm ROYGBV D -1  (nm)

from "Chemical Instrumentation", 2 nd ed. by Howard Strobel, 1973 Wavelength, nm ROYGBV D -1

Effect of Focal Length, F  = slit width (mm) Light bandwidth in nm

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