Waves Y8 Flashcards
Compression
A compression is a region in a longitudinal wave where the particles are closest together
Electromagnetic spectrum
The electromagnetic spectrum is the range of all types of EM radiation
Gamma rays
Gamma rays are the penetrating electromagnetic radiation arising from radioactive decay of atomic nuclei
Infrared
Infrared waves are and electromagnetic wave which is invisible to the naked eye but can be felt as heat
Ionisation
When an atom is converted into an ion or ions, by removing one or more electrons
Longitudinal waves
Longitudinal waves are waves in which the displacement of the medium is in the same direction as, or the opposite direction, to the direction of propagation of waves
Loudspeaker
An electroacoustic transducer which converts and electrical audio signal into a corresponding sound
Microphone
A microphone is a transducer which converts sound into an electrical signal
Microwaves
Microwaves are a form of electromagnetic radiation with wavelengths ranging from 1m to 1mm
Pressure wave
a wave (such as a sound wave) in which the propagated disturbance is a variation of pressure in a material medium
Radio waves
Radio waves are a type of electromagnetic radiation with wavelengths higher than infrared light
Rarefraction
The reduction of an item’s density, the opposite of compression
Superposition
The principle of superposition states that, when two or more waves of the same type cross at some point, the resultant displacement at that point is equal to the sum of the displacements due to each individual wave.
Transverse wave
In physics, a transverse wave is a moving wave whose oscillations are perpendicular to the direction of the wave or path of propagation
Ultrasound waves
Ultrasound is sound waves with frequencies higher than the upper audible limit of human hearing. Ultrasound is not different from “normal” (audible) sound in its physical properties, except that humans cannot hear it.
