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A wave is made up of periodic motion. Periodic motion is motion repeated at regular intervals.
For example, a pendulum moving from left to right and back again is said to be periodic. One such complete motion, from one position to the other and back is known as an oscillation or a vibration. These are key words in describing periodic motion. The source of any wave is a vibration or oscillation.
Waves move back and forth but energy moves forward. Transverse waves are waves that travel in a direction perpendicular to the direction of vibration. The waves on ropes are transverse when you move the rope up and down.
The direction of wave motion is forward, to the opposite end of the rope. But the wave crest and trough are moving up and down, which is the direction of vibration as you are moving the rope up and down, which is perpendicular to the direction of wave motion-which is forwards.
Perpendicular-at right angles to Eg.
Water and light waves are transverse waves. Longitudinal waves are waves that travel in a direction parallel to the direction of vibration. It is the height of the crest or depth of a trough measured from the rest position. It tells you the 'loudness' if it's a sound wave.
The bigger the amplitude, the louder the sound. Its SI unit is the metre m. This is the number of complete wave produced per second.
Frequency relates to the pitch of a sound, the higher the frequency the higher the pitch. This is the time taken for one point on the wave to complete one oscillation. Or you can think of it as the time taken to produce one complete wave. The SI unit is second s. The shortest distance between a point on one wave and the same point on the next wave.
For longitudinal waves, it is the distance between two successive compressions or rarefactions.
For example, when we drop a pebble into a pond, a few circular ripples move outward on the surface of the water. As the ripples spread outward, any object on the surface of the water e. This shows that waves transfer energy without transferring any matter!Top quality Computer Science resources for KS3, KS4, KS5.
A guide to the psychodynamic theory of gender development, such as Freud's oedipus complex, electra complex and gender disturbances, for GCSE Psychology.
attheheels.com GCSE Revision Notes Physics Revision Notes – Waves 1. All waves carry energy from one place to another. There are two types of waves: • Transverse waves have vibrations perpendicular to the direction of travel (e.g.
all Sound is a longitudinal wave. c) Electromagnetic waves are transverse, sound waves arelongitudinal and mechanical waves may be eithertransverse or longitudinal.d) All types of electromagnetic waves travel at thesame speed through a vacuum (space).e) Electromagnetic waves form a continuousspectrum.
Apr 22, · E.g. sound waves are longitudinal waves. state the meaning of amplitude, frequency, wavelength and period of a wave Amplitude (A): This is the maximum displacement from the rest/centre position.
Sound waves are vibrations, and as we have seen, cannot travel through a vacuum - the total absence of matter.
The more matter there is, and the closer atoms are together, the easier it is for sound can travel. In air, which is a mixture of gases, the speed of sound is around m/s, depending on air temperature.