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Bond TC and Bergstrom 2006 review results of measurements of the complex refractive index of carbonaceous particles in a part of their review of light absorption by these particles. Based on their Table 4, the following limits of the real and imaginary parts of the refractive index in the vicinity of the wavelength of 550 nm, can be given:
Bond TC and Bergstrom 2006 hypothesized that some variations in the refractive indices of carbonaceous materials measured by various researchers result from the presence of voids in the particle material and show that a significant portion of these variations can be explained by by this hypothesis. They do this by using the Bruggeman approximation (for example, Chılek et al 1988) for an effective refractive index of composite material: air, n = 1.0 - 0i plus "voidless" carbon, n = 1.95 - 0.79i. Other variations in the refractive index of carbonaceus matter, particularly for coal, could be caused by differences in graphitization.
| CITATION: Jonasz M. 2006. Refractive index of carbon (www.tpdsci.com/Tpc/RICarbon.php). In: Top. Part. Disp. Sci. (www.tpdsci.com). |
HISTORY: Published: 23-Feb-2006 Modified: 29-May-2006 Peer-reviewed: 28-May-2006 |
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