Matter radiates both propagating and evanescent electromagnetic waves. Localized surface plasmons are distinct from propagating surface plasmons. The wave carries energy throughout the propagating medium. Subwavelength apertures are holes smaller than the wavelength of light propagating through them. A shock wave is a type of propagating disturbance. Planting of these is the most conventional way of propagating bamboo. It forms an array of cavities that slow the speed of the propagating sound waves. The ion channels open based on pain stimuli propagating action potentials in sensory neurons. Carry-lookahead logic uses the concepts of "generating" and "propagating" carries. Planck did not propose that light propagating in free space is quantized. Voltaire distrusted democracy, which he saw as propagating the idiocy of the masses. Political organizations established in Turkey are banned from propagating or supporting separatism. He also accused them of propagating "racist hatred". The popes themselves are partly responsible for propagating this idea. The fuselage frames did not have sufficient strength to prevent the crack propagating.