31. Second-order initial conditions are found that suppress secular behavior and excite a wave packet of which the energy agrees with fluid theory. 32. The strong, polarized electromagnetic field, holds or " traps " each electron wave packet in an intentionally selected orbit ( energy shell ). 33. A propagating wave packet ; in general, the " envelope " of the wave packet moves at a different speed than the constituent waves. 34. A propagating wave packet; in general, the " envelope " of the wave packet moves at a different speed than the constituent waves. 35. Because the group velocity varies with " k ", the shape of the wave packet broadens with time, and the particle becomes less localized. 36. First, a wave packet , i . e . a quantum-mechanical particle, which is Simon A . 06 : 41, 12 October 2006 ( UTC) 37. Just multiply the cycle frequency by the number of seconds you're generating the wave packet for and boom, you have the number of cycles. 38. The envelope of the resulting " wave packet " is not really a proper wave it's the result of the interference of several component waves. 39. In a wave packet , the wavelength of the particle is not precise, and the local wavelength deviates on either side of the main wavelength value. 40. In effect, the individual waves ( which travel with the phase velocity ) escape from the wave packet ( which travels with the group velocity ).
