Sound waves, pressure waves and primary waves (a type of seismic wave produced by earthquakes), are longitudinal waves. Longitudinal waves can also be made by pushing a spring forwards and ...

Sound Waves. Part of Science Physics. ... Ultrasound waves are longitudinal waves just like sound waves, and they cannot pass through a vacuum. Ultrasound waves have a frequency above 20 000 Hz, ...

More information: Pan Liu et al, A stable all-solid-state continuous-wave single-longitudinal-mode Nd:YVO 4 laser at 1064 nm based on the molecular iodine absorption, Optics & Laser Technology (2025).

THE temperature-dependent part of the ultra-sonic attenuation in single crystal quartz at frequencies in the range 600–1,200 Mc/s has been investigated at low temperatures. Fig. 1 refers to ...

Sunday Times News: Sound is propagated in the form of longitudinal waves. When sound travels from one medium to another, both its velocity and wavelength undergo changes ...

ALL seismic work indicates that at least part of the core of the earth is liquid, since no transverse waves have ever been observed to pass through it. It has been suggested, however, that the ...