Revision

Revision

1. Ear

   • The ear drum is the part of the ear that vibrates
   • a spiral shaped structure with tiny hairs inside. These vibrate with the sound and send a signal through the auditory nerve to the brain.
   • a spiral shaped structure with tiny hairs inside. These vibrate with the sound and send a signal through the auditory nerve to the brain.

2. Sound Waves

   • A waveform as two key things that we can measure.
     • Amplitude: This is the vertical distance between the central line and a peak or trough
     • Wavelength: This is the horizontal distance between one part of a wave and the same part of the next wave. This is most easily measured form peak to peak or trough to trough.

3. What is light

   • Light waves are electromagnetic waves. Unlike sound waves they are not made up of particles and so can travel through vacuums such as space.

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