Full wavelength range (Xray-IR) for extinction, expressed relative to 1µ (AJ)
The UV-IR portion of the extinction curve, here expressed as E
-V/EB-V = RV(A/AV - 1) where RV ~ 3.1 for normal
galactic extinction 
Standard extinction law in tabular form (from B&M)
Image Credits: B&M and Whittet