WAVES A wave is a rhythmic disturbances that transfer energy through matter or space.

A wave does work on everything in its path. WAVES A wave does work on everything in its path.

WAVES Wave Classification Mechanical Wave -- Waves that require a medium (matter) Electromagnetic Waves -- Waves that do not require a medium (matter)

Mechanical Waves Waves that require a medium A medium may be a gas, a solid, or a liquid. Simply put a medium is the material through which a wave transfer energy.

Mechanical Waves Waves that require a medium Examples Ocean waves Earthquakes

Mechanical Waves Waves that require a medium Cause rhythmic disturbance in the medium • Travel through medium • Transmit energy • Leave the medium unchanged after the wave passes

Mechanical Waves Examples 1. Radio waves 2. Visible light Waves that require a medium Examples 1. Radio waves 2. Visible light

Mechanical Waves Examples 1. Radio waves 2. Visible light Waves that require a medium Examples 1. Radio waves 2. Visible light

Electromagnetic Waves Waves that DO NOT REQUIRE a medium These waves do not require matter for transfer energy. Can travel through outer space or a vacuum.

Waves NOW REMEMBER… There are two types of waves: 1.Mechanical Waves 2.Electromagnetic Waves Wave type is based on whether or not the wave needs a medium to travel through.

Characteristics Of Waves 1. Different Movements of Waves 2. Physical Characteristics a Transverse Wave 3. Calculation of Wave Velocity

Characteristics Of Waves Transverse waves – Medium moves at right angles to the direction of the wave Longitudinal or Compressional Waves – Medium moves in the same direction as the waves are moving

Movements Of Waves Transverse waves – Medium moves at right angles to the direction of the wave

Movements Of Waves Longitudinal or Compressional Waves – Medium moves in the same direction as the waves are moving

Waves Now Remember… There are two types of waves: 1.Mechanical Waves 2.Electromagnetic Waves AND… Waves are classified by the way they travel 1.Transverse Waves 2.Longitudinal or Compressional Waves

Physical Characteristics of Transverse Waves Crest - The highest point of a wave

Physical Characteristics of Transverse Waves B. Trough - The lowest point of a wave

Physical Characteristics of Transverse Waves Wavelength -- The distance between a point on one wave and the identical point on the next wave.

Physical Characteristics of Transverse Waves Wavelength -- Represented by the Greek letter lambda λ

Physical Characteristics of Transverse Waves Amplitude -- The distance from the crest or trough of a wave to the rest position.

Physical Characteristics of Transverse Waves Frequency - The number of waves crests of a wave that pass one place in one second

Physical Characteristics of Transverse Waves Frequency is measure in hertz (Hz). One hertz = one wave per second Frequency is represented by the letter f.

Physical Characteristics of Transverse Waves Example A: If ten wave crest pass a point every five seconds, what is the frequency of the wave?

Physical Characteristics of Transverse Waves Example A: If ten wave crest pass a point every five seconds, what is the frequency of the wave? f = ten waves / 5 seconds f = 2 hertz