Loudness - How loud you perceive a sound., Frequency - The number of complete waves or vibrations per second., Pitch - A property of sound determined by its frequency., Ultrasound - Sound of a frequency greater than 20,000Hz beyond the range of human hearing., Decibel - A unit of sound or loudness (dB)., Emit - To give out., Reflect - To bounce off., Incident Ray - The ray coming from a source of light., Reflected Ray - The ray that is reflected from a surface., Angle of Incidence - The angle between the incident ray and the normal line., Angle of Reflection - The angle between the reflected ray and the normal line., Prism - A triangular shaped piece of glass used to produce a spectrum of light. , Amplitude - he distance from the middle to the top or bottom of a wave., Wavelength - The distance between two identical points on the wave. ,

Year 8 Waves

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