AQA GCSE Longitudinal waves (Combined Science)
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Waves
Waves transfer energy and information, but not matter.
Waves are either transverse or longitudinal
Longitudinal Waves
A longitudinal wave vibrates along the direction in which the wave transfers energy
The longitudinal wave is made up of a series of compressions (high pressure) where the lines are close together and rarefactions(low pressure) where the lines are spaced apart.
Slinky spring and Longitudinal Wave
When a slinky spring is pushed forwards and backwards a longitudinal wave occurs in the slinky spring.
Examples of Longitudinal Waves
Sound waves
Ultrasound waves
P waves (Primary waves), these are a type of seismic (earthquake) wave.
Pressure waves, sometimes known as compression waves are due to regions of high and low pressure in fluids.
Practice Question
1.State the definition of a longitudinal wave
2. Complete the sentence:
A longitudinal wave is a series of ______________ and ________________.
3. State three examples of longitudinal waves
Absorption and Emission of EM Radiation
JJ Thomson and Plum pudding model
Ernest Rutherford and the Nuclear Model
Niels Bohr changing the Nuclear Model
Discovering the Proton and Neutron
Measuring radiation from radioactivity
Radiation types and properties
Random nature of radioactive decay
Radioactive contamination or irradiation
Hazards of contamination and irradiation
Studies on the effects of radiation on humans