Wave Properties.

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Presentation transcript:

Wave Properties

Objectives Content: SW describe the five parts of a wave. Language: SW take notes on waves and participate in wave examples.

Wave Wave - Rhythmic disturbance that carries energy through matter and space ALL WAVES CARRY ENERGY Pulse – one wave that travels through a medium Continuous waves – waves that repeatedly move up and down

Transverse Waves Transverse waves – matter in the medium moves back and forth at right angles to the direction that the wave travels.

Parts of a Transverse Wave Crest – top of a wave Trough – bottom of a wave

Parts of a Transverse Wave Amplitude – ½ the height of a wave Relates to the amount of energy carried by the wave

Parts of a Transverse Wave

Parts of a Transverse Wave Wavelength – the length of one cycle of a wave Abbreviated by using the symbol, λ

Transverse Wave Frequency – how many cycles (waves) are completed in a second

Compression/ Longitudinal Waves Compressional waves – matter in the medium moves in the same direction that the wave travels. Example: Sound waves

Parts of a compression wave Compression – the area where the particles are more dense

Parts of a compression wave Rarefaction – The less dense area of the wave

Parts of a compression wave Wavelength – One complete cycle of a wave λ

Surface Waves both transverse & compressional; examples: water waves, seismic waves

Medium Most waves need something to travel on (or through) The substance through which a wave travels is a medium

Standing Waves Appear to be standing still Standing waves are caused by two waves continuously interfering with each other.

Types of Waves… A B C D

Reflection The angle at which a ray strikes a surface is equal to the angle at which it is reflected

Reflection (line drawn perpendicular to the reflecting surface) normal line

Reflection (ray that bounces off of a surface) Reflected ray

Period and Frequency Period (P) – time it takes for one wave to pass The unit of a period is the second (s) Frequency (F) – the number of waves that pass each second The unit of frequency is Hertz (Hz)

Formula 1 Frequency = 1/ period f = 1/T Write this down 1 P F

Formula 2 V F λ Velocity = frequency x wavelength V = F x λ Write this down V F λ