Waves transfer , not the with it. A causes particles in matter to move back and forth at right angles to the direction in which the wave travels. High points in a transverse wave are called . Low points are called . A wave causes particles in matter to move back and forth along the same direction in which the wave travels. The places in a longitudinal wave in which the coils are squeezed together are called . The places in the wave in which the coils are spread apart are called . The of a transverse wave is the distance between two adjacent crests or two adjacent troughs. The of a compressional wave is the distance between two adjacent compressions or rarefactions.. The of a wave is the number of wavelengths that pass by a point each second. Frequency is measured in units of . The of a wave depends on the medium in which the wave travels. To make a wavelength of rope shorter, one should shake the rope at a frequency. The speed of a wave can be found using the equation . As the wavelength of a wave increases, the frequency of the wave . The energy of a wave depends on its .