Wave Characteristics.

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Presentation transcript:

Wave Characteristics

Waves Wave any disturbance that transmits energy through matter or space Waves move through matter but they do not move the matter itself Medium what a wave travels through (ie. water, ground, air) Mechanical waves NEED a medium Electromagnetic waves DO NOT NEED a medium Vibrations of particles move the energy through media like liquid and solids and even gas like air.

Mechanical Waves Ocean Waves Sound Waves Seismic Waves Slinky Waves They all need a MEDIUM to travel through!!

Electromagnetic Waves Radio Waves Micro Waves Infrared Waves Visible Light Ultraviolet Radiation X-rays Gamma Rays They DO NOT need a MEDIUM to travel through! They can travel through space!!

Types of Waves Particles in a TRANSVERSE wave vibrate in an up and down motion, perpendicular, to the wave direction. Particles in a LONGITUDINAL wave vibrate in a back and forth motion, parallel, to the wave direction.

Parts of a Transverse Wave Crest: the highest point on a wave. Trough: the lowest point on a wave.

Longitudinal Waves Compression: an area in a wave where the particles are closer together. Need slinky photo here to explain Rarefaction: an area in a wave in which the particles are spread further apart.

Properties of Waves Amplitude is the height of a wave; the maximum distance particles vibrate from the rest position. Wavelength is the distance between two adjacent corresponding parts of a wave.

More Properties of Waves 2 3 1 The wave speed can be calculated by multiplying the wave’s wavelength by the frequency. Frequency is the number of waves that are produced in a given time, and is measured in hertz.

Wave Movement… Reflection: When waves bounce off something. Echo: A reflected sound wave Refraction: When a wave is bent at an angle as it passes through a new medium. Diffraction: When a wave is bent around a barrier or an opening. Would like some images for this page and maybe split it into two slides Resonance: When the vibration of one object causes another object nearby to vibrate. Some musical instruments use resonance to produce sound.

Wave Interference Interference: when two waves overlap. Constructive interference: two waves overlap and make a larger wave Destructive interference: two waves overlap and they cancel each other out.