Lets review what we have learned…..

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Presentation transcript:

Lets review what we have learned…..

Waves What is a wave? What is a mechanical wave? A disturbance that transfers energy from place to place! What is a mechanical wave? A wave that travels through a medium Example? How are mechanical waves produced? Cause a medium to vibrate (up and down or side to side)

Waves Do Mechanical waves take the medium in which they are traveling through with them? NO What happens? The waves energy passes from particle to particle

Waves Waves that move the particles of a medium PARALLEL to the direction in which the waves are traveling are called……… Longitudinal waves

Waves Waves that move the particles of a medium PERPENDICULAR (at right angles) to the direction in which the waves are traveling are called……… Transverse waves

4 properties of waves Amplitude Wavelength Speed (velocity) frequency

Properties

Wave Measurements v v f * λ f * λ v f * λ

EM Waves How do they travel? How fast Through empty space Speed of light

EM Spectrum radar

Wave Interactions The bending of waves due to a change in speed? Refraction When a wave hits a surface which it can not pass through it bounces back in a process called….. Reflection What interaction explains how you can hear sounds around a corner? Diffraction

Reflection What does the law of reflection state? The angle of incidence must equal the angle of reflection.

What is happening here?

Wave Characteristics What type of interference is this? What is happening here ?

Wave Characteristics What is a standing wave? A wave that appears to be standing in place It is really two waves interfering as they pass each other.

Standing wave What is a node? What is a antinode? Zero amplitude Point of maximum amplitude

Resonance What is resonance? An increase in vibrations that occur when something else vibrates at an objects natural frequency.