Reflection and Refraction Maxwell's equations lead to definition for ...

The total intensity t(λ) measured at the exit slit as image is translatedis called the slit function- for equal entrance and exit slits, shape is triangular- for unequal entrance and exit slits, shape is trapezoidalwith a base of s and half-width of s gMathematically, the slit function iswhere( ) = 1− ⎜λ − λ 0t λ⎛⎝s g⎞⎟⎠t(λ) = 0 elsewhereλ 0 −s g ≤ λ ≤ λ 0 +s gλ is the incident (monochromatic) wavelength at entrance slitλ 0is the wavelength setting of the monochromator (thewavelength directed to the center of the exit slit)ResolutionResolution quantifies how well separated two features are at the exitslit• closely related to linear dispersion (D l )(or angular dispersion (D A ), and physical dimensions of themonochromator (through f))• slit width WCEM 835 page 3-21