T3 Sci rev

• Wave 

  A disturbance/vibration that transfers energy through matter or space
• Vibration

  Produced whenever a particle moves up and down or back and forth
• Medium

  Is any material or matter that a wave can travel through
• Direct Propagation: 

  1. Transverse Waves
  2. Longitudinal Waves
• • Transverse Waves 

  The motion of the particles in the medium is perpendicular
• Medium Propagation: 

  1. Mechanical Waves

        2.  Electromagnetic Waves 
• • Longitudinal Waves

  The motion of the particles in the medium is parallel to the direction of the wave (straight line)
• • Mechanical Wave

  It requires a medium in order to be able to propagate
• • Electromagnetic Wave

  It does not require a medium to be able to propagate
• crest - highest point

  through - lowest point
• amplitude - distance of crest to rest position

  wavelength - distance of 1 crest and the next

  wave pulse - one disturbance/curve

  periodic pulse - 2+ wavepulses
• transverse waves form a right angle
• longitudinal waves are parallel
• longitudinal wave parts

  compression - close

  rarefraction - stretched
• medium of propagation

  mechanical - requires medium

  electromagnetic - doesnt require medium
• sound travels faster in solids
• speed of sound is affected by temperature
• hot temp - faster sound travels

  cold temp - slow
• sound travels in gas the slowest
• sound waves are longitudinal and mechanical for they require mediums to propagate
• sinusoidal waves have alternating regions of compression and rarefraction
• properties of sound include pitch
• high frequency - high pitch

  low frequency - low pitch
• properties of sound include pitch and quality/timbre
• red is the lowest light intensity and violet has the highest
• shadows block light
• Light Waves 

  The particles of light are called photons.
• sound wave - mechanical and longitudinal

  light - electromagnetic and transverse
• Amplitude measures the energy the waves carry.
• 1. Color

  Depends on the wavelength of the object.
• Shorter Wavelength = Highest frequency

  Long Wavelength = Lowest frequency 
• • Amplitude (A)

  The distance in-between crest to rest position
• • Period (T)

  Refers to the time it takes for the particle to have one complete vibration
• • Wavelength (λ)

  the distance between crest to crest or trough to trough
• • Frequency (f)

  The number of vibrations created in a given time
• • Wave Speed (v)

  Refers to how far a point in a wave traveled at a given time
• lower the amplitude, the softer or lower the sound.
• The higher the amplitude, the louder or higher the sound.
• Quality 

  • Makes the sound unique
• Decibels (dB)It is the measuring unit for the loudness of sound.