Both light and sound waves reflect and refract.
Both light and sound waves have all the properties of a wave as they are wave motions.
Both light and sound waves are forms of energy propagating through media.
Light is an electromagnetic and tranverse wave, whereas sound is a mechanical and longitudinal waves.
Sound Waves cannot travel through vacuum as it require a medium to travel, whereas light waves can travel through vacuum.
The denser the medium, the slower the speed of light waves whereas the denser the medium, the greater the speed of sound waves
Pitch refer to the frequency of a given note/tune
The higher the frequency of a sound, the higher its pitch
Cathode Ray Oscilloscopes can be used to show the waveforms of sound with different frequency
Amplitude refers to the maximum displacement of the wave from the rest position
The greater the amplitude,the louder the sound.
Sound waves are produced when a vibrating object cause small but rapid changes to the air pressure around it.
When layer of airs are pushed close together,a compression of the air particles is formed.
When layer of airs are pulled apart,a decompression or rarefaction of the air particles is formed
Compressions are regions in the medium where the particles are closer together.It is also where air has a slightly increased pressure, as a result of the particles being closer together
Rarefactions are regions in the medium where the particles are spread out.It is also where air has a slightly decreased pressure, as a result of the particles being spread out.
Wavelength for longitudinal waves is the distance between adjacent regions where the particles that are moving are in phrase.
Waveform of sound show how the air pressure changes with time.The crest of the waves correspond to compressions of the sound wave while the trough of the waves correspond to rarefactions.
Sound waves need a medium for transmission.
Sound waves cannot propagate through vacuum but can propagate through solid,liquids and gases
Differences in the strength of the inter-atomic forces
Closeness of the atom in the three states
Diagnostic Sonography, Widely used in obstetrics to determine the biological characteristics of a fetus
Ultrasound Welding, It is used in plastics where high frequency at about 15KHz to 40KHz and low amplitude vibration is used to create heat by way of friction between the materials to be joined
In gases, Air, 331m/s at 0 degrees, 343m/s at 20 degrees
In Liquids, Pure Water, 1482m/s, Mercury, 1450m/s
In Solids, Steel, 5960m/s, Glass, 5640m/s
Speed of sound, Solid>liquids>Gases
Calculation, Speed= Distance/ Speed, Speed= Frequency * Wavelength
Factors, Wind conditions, Temperature, Humidity
Sound waves can be reflected by large hard surfaces like bulidings,walls and cliffs
An echo is when the reflected sound is heard as a separate sound after an interval of silence
Echo can be used to find distance.
Formula: v= 2d/t with t being the echo time.
The echo cannot be heard because the reflected sound follow very closely behind the direct sound tha the two cannot be heard as separate sounds
The original sound just seems prolonged. This is called reverberation.