U6 Waves

• Wave - Repeating movement that transfers energy through matter of space
• Amplitude - Distance between the maximum point of a wave and its rest position
• Frequency - amount of waves passing a point each second, measured in Hertz (Hz)
• Longitudinal waves - Direction of particle movement is parallel to the direction of the wave
• Compression - Compressed air with slightly high pressure
• Rerefaction - Regions between lower air pressure
• Wave length- Distance between the same point of two consecutive wave
• Transverse wave- The direction of particle movement is at right angle (perpendicular) to the direction of the wave
• Volume - The higher the volume, the higher the amplitude
• Pitch- Higher the frequency of waves the higher the pitch is
• Sound waves - Longitudinal waves. Produced by vibration of particles colliding eachother as waves.
• Sound travels at 343m? Through AIR
• Sound travels through liquids and solid faster since the particles are closer
• Hard surfaces relects sound well (Echo), whereas, soft surfaces dont, since they absord sound
• Outer Ear - collects and directs sound waves
• Ear drum = Vibrates when sound waves hit
• Inner ear - converts vibration into electrical signals
• Sound waves transfers energy but not matter
• Light waves can travel through a vacuum (empty space)
• Light waves does not require a substance to travel through, though can travel through transparent, translucent
• Albedo - reflectivity of light
• Reflection - when light bounes of an object
• ray diagram - representation of how light travels and what happnes when it reaches a surface
• Electromagnetic waves - Transverse waves with ranges of properties and use
• Short wave length - high frequency and high energy
• Longer wave length - Lower frequency and lower energy
• Visible light - range of wavelength a human eye can view
• all waves travel at the same speed 300000000m/s
• Radio waves Microwaves Infrared Visual light Ultra Violet X rays Gamma rays