31. The feather was further studied using energy-dispersive X-ray analysis in 2011. 32. In dispersive media the phase velocity is not necessarily the same as the group velocity. 33. This is typically represented as a spatially dispersive loss in the plasma's permittivity. 34. A generalization to dispersive materials is possible under certain circumstances at the cost of additional terms. 35. In 1914 he worked with L�on Brillouin on the propagation of electromagnetic waves in dispersive media. 36. For a given distance between the dispersive elements, prisms generate much less dispersion than gratings. 37. ASPEX specializes in the manufacturing integrated Energy-dispersive X-ray spectroscopy and electron microscope. 38. This effect is described in the article Dispersive body waves by Futterman ( 1962 ). 39. Originally the averaged Lagrangian method was developed by Whitham for slowly-varying dispersive wave trains. 40. An alternate method for acquiring spectra is the " dispersive " or " scanning monochromator " method.
