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Chapter 1: Characteristics of Waves
Transcript of Chapter 1: Characteristics of Waves
Ch. 1 - Characteristics of waves
4. Mechanical Waves
6. Transverse Waves
9. Longitudinal Waves
Section 2 Vocabulary
4. Hertz (Hz)
Section 3 Vocabulary
2. Law of reflection
6. Constructive interference
7. Destructive interference
8. Standing wave
Section 4 Vocabulary
1. Seismic waves
2. P waves
3. S waves
4. Surface waves
What causes waves?
Some waves need something to travel through...
These types of waves are called MECHANICAL WAVES
2 Types of Mechanical Waves
1. TRANSVERSE =
Waves that move medium at right angles to the direction in which the waves travel.
2. LONGITUDINAL =
Waves that move the medium parallel to the direction in which the waves travel.
Which medium can send energy the fastest?
"Elephants hear well because they have big
The lowest part of a wave.
The highest part of a wave
The distance from one crest of a wave to the next crest (or from one trough of a wave to the next trough).
The height of a wave.
When a wave hits a surface through which it cannot pass, it bounces back.
Law of Reflection
The angle of incidence equals the angle of reflection.
The bending of waves as they pass from one medium into another at an angle.
The wave changes speed in the second medium.
A disturbance that causes a vibration.
... a MEDIUM...
... such as a gas, liquid, or solid
Mechanical waves are produced when energy causes a medium to vibrate.
The line that shows an amplitude of
Questions 1 & 2 on pg 10
The bending or spreading out of waves as they pass a barrier or move through a hole.
When two waves combine to make a wave with a larger amplitude
When the amplitudes of two waves combine with each other producing a smaller amplitude.
= constructive interference
= destructive interference
An increase in amplitude that occurs when external vibrations match an object's natural frequency.
TITLE: WAVE LABS
LAB NAME: 2 WORDS
OBJECTIVE: 1 FULL SENTENCE
HYPOTHESIS: 1 FULL SENTENCE / PIC
OBSERVATION: 3 BULLET POINTS / PIC
CONCLUSION: 3 FULL SENTENCES / PIC
OBJECTIVE: To show the effects of light waves bending as they travel through different mediums.
OBJECTIVE: To model real life examples of how water waves can be controlled.
MAKING SENSE OF RESONANCE
OBJECTIVE: To create a visual aid that will show us what resonance is and how it effects the world around us.
WAVES are a way to move energy from one spot to another.
Does the medium move?
= 'smushed' together part
= 'spread out' part
WAVELENGTH = FROM 1 COMPRESSION TO THE VERY NEXT COMPRESSION
(OR FROM 1 RAREFACTION TO THE VERY NEXT RAREFACTION)
FREQUENCY: The number of waves that pass through a point in 1 second.
Frequency is measured in Hertz (Hz)
1 Hz = 1 wave per second
Fastest = solid
Slowest = gas
Mike Riley challenged Husker fans to have 'the wave' go around the stadium 5 times in 30 seconds this past weekend.
What wave frequency would have been necessary to complete this challenge?
When I was practicing the harp over fall break, I plucked the string to play an 'A' and the string vibrated 220 times every half second.
What is the frequency
of that harp string?
At the beach this summer I counted how many waves hit me in 1 minute. There were 111 waves. What was the frequency?
I saw my BFF this weekend at the bowling alley. He waved at me for an hour. During that time his hand moved back and forth 5,283 times. With what frequency was he waving?
SECTION 1.2 - PROPERTIES OF WAVES
(MythBusters - Assassination attempt on Hitler)
(noise canceling headphones)
(knocking down markers demo)
(MythBusters - fire standing wave)
(Past life melody)