6 1 Wave Properties SAS Curriculum Pathways Wave
- Slides: 28
6. 1 Wave Properties
SAS Curriculum Pathways Wave Properties
Wave Motion What happens if you drop a pebble into the water? The disturbance created by the pebble generates water waves that travel away from the disturbance
Wave is the Motion of a Disturbance ØThis disturbance causes water on the surface near that point to move, which in turn causes points farther away to move. ØIn this way, the waves travel outward in a circular pattern away from the original disturbance.
Wave is the Motion of a Disturbance ØThe water is the MEDIUM through which the disturbance travels. ØThe medium does not actually travel with the waves. ØAfter the waves have passed, the water returns to its original position.
MECHANICAL WAVES = need MEDIUM ØMost of the waves (sound waves, spring waves…) need MEDIUM (air, water…)
MECHANICAL WAVES = need MEDIUM ØWe call them MECHANICAL WAVES
ELECTROMAGNETIC WAVES = DO NOT need MEDIUM ØThey can travel through vacuum
Wave Types PULSE • Non – repeating wave • Only single disturbance PERIODIC WAVE • Repeating wave • Period = recurring at regular intervals
Describing Waves
CREST • The highest point on the waves
Trough • The lowest point on the waves
Wavelength • The distance between successive crests or troughs
Amplitude • The height of the wave
Frequency (f) measured in Hz • How often the waves and their source vibrate per second (how many wavelengths per second)
Period (T) measured in • The time interval between vibrations (of the seconds wavelength) • Inverse of FREQUENCY
1. 25 Hz 0. 800 s 256 Hz 3. 91 x -3 10 s 0. 25 Hz
Transverse Waves • A wave whose particles vibrate perpendicularly to the direction of the wave’s motion. • The spring is pulled sideways (up) while the pulse travels in the perpendicular direction (to the right)
Longitudinal Waves • When several turns of the spring are compressed and let go • The disturbance is in the same direction as the pulse will travel
Longitudinal Wave • A wave whose particles vibrate parallel to the direction the wave is traveling
Wave REFLECTION • When a wave encounters a boundary (shoreline, different medium…) and it is reflected back
Wave REFRACTION • When a wave hits a boundary at an angle OR the wave enters a new medium • The wave’s speed is changed AND it is BENT
The Wave Equation Speed is equal to displacement divided by the time it takes to undergo that displacement For waves, a displacement of one wavelength (λ) occurs in a time interval equal to one period of the vibration (T).
The Wave Equation Because frequency and period are inversely related, Substituting this frequency relationship into the previous equation for speed gives a new equation for the speed of a wave.
vibrates with a frequency of 262 Hz. Assuming the speed of sound in air is 343 m/s, find the wavelength of the sound waves produced by the string.
Practice Problems 6. 1. 1 If f doubles, λ is halved If f halves, λ is doubled 200 Hz 1. 5 m
Answer the Concluding Questions
6. 1 Review Questions (all)
- Sas curriculum pathways
- Easy sas core classes
- Standards aligned system pa
- Difference between intensive and extensive properties
- Chemical property of water
- Wave properties lesson 2
- Properties of sound
- Changes in wave properties sorting activity answer key
- Property of mechanical waves
- Properties of matter wave
- Sound waves are electromagnetic waves. true false
- Long waves and short waves
- Difference between full wave and half wave rectifier
- Difference between transverse wave and longitudinal wave
- Define half wave rectifier
- Full wave rectifier circuit
- Earthquake p-wave and s-wave travel time graph
- Full wave rectified sine wave fourier series
- Wave wave repeating
- Wave wave repeating
- Half wave symmetry fourier series
- Mechanical and electromagnetic waves venn diagram
- Characteristics of mechanical waves
- Wavelength formula triangle
- Pathways modesto
- Nys graduation pathways
- Dysmetria
- South forsyth high school pathways
- Sdsu pathways