41. Note that this is NOT a plane wave . 42. The incident light is assumed to be a plane wave , and effects of edges are neglected. 43. As just stated, its eigenstates are plane waves . 44. A parabolic reflector focuses an arriving plane wave on one or a small subset of feed elements. 45. Interfering an optical vortex with a plane wave of light reveals the spiral phase as concentric spirals. 46. Plane wave fitting requires interactive analyst's work.47. A plane wave exists everywhere in space. 48. An expansion in plane waves often has a poor quality and needs many basis functions to converge. 49. The energy of each of these plane waves is inversely proportional to the square of its wavelength. 50. The Fourier transform is a mathematical operation that separates a wave packet into its individual plane waves .
