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MS-PS4.C

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*Old forms of communication vs. new
*Natural forms of communication vs. tech-based instruments (i.e. human ear vs microphone OR human eye vs telescope charge-coupled devices or camera)

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Waves can be modeled to help explain their properties (brightness, color, frequency) and behavior with different media

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Digital signals (sent as wave pulses) are a more reliable way to encode and transmit information.

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Light waves do not need a medium through which to travel. (unlike all other waves) This makes it possible for light to travel through space.

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Waves can be categorized based on their properties and behavior.

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The path of light can be traced. Light travels as straight lines except at the surfaces between different materials (air and glass).

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Waves in a Slinky!

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The medium through which sound travels affects the way it travels. Observable differences can be detected in volume (amplitude) and/or pitch (frequency).

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Sound waves require a medium through which to travel.

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Frequency of light determines the behavior and color of the light.

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When light shines on an object it is reflected, absorbed, or transmitted through. Which of these happens is determined by the object's material and the frequency of light.

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In sound waves = volume
In light waves = brightness/intensity

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The distance between the resting position and the maximum displacement of the wave

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Distance between corresponding points of two consecutive waves (i.e. trough to trough or node to node)

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Relationship between wavelength and frequency

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Relationship between wavelength and frequency

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The relationship between wavelength and frequency is inversely proportional and can be calculated.

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A wave has a simple repeating pattern.

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How many waves pass by a specific point in a given amount of time, aka cycles per second. Units = 1/s or Hertz

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Waves have specific wavelength, frequency, and amplitude. These properties make each wave unique.

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The observable properties of sound and light are dependent on the properties of the wave. (from PE Bundles Summary)

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How to address EM waves (connect to PK from 7.4 but avoid HS boundary)

Units, equation and math connections - how to help students with units like inverse seconds.