Physics SL
Physics SL
5
Chapters
329
Notes
Theme A - Space, Time & Motion
Theme A - Space, Time & Motion
Theme B - The Particulate Nature Of Matter
Theme B - The Particulate Nature Of Matter
Theme C - Wave Behaviour
Theme C - Wave Behaviour
Theme D - Fields
Theme D - Fields
Theme E - Nuclear & Quantum Physics
Theme E - Nuclear & Quantum Physics
IB Resources
Theme C - Wave Behaviour
Physics SL
Physics SL

Theme C - Wave Behaviour

Unlocking The Secrets Of Sound Waves: From Smartphone To Ear

Word Count Emoji
663 words
Reading Time Emoji
4 mins read
Updated at Emoji
Last edited on 5th Nov 2024

Table of content

What are sound waves? 🎵

  • Sound waves = Longitudinal waves
  • They can move through
    • Gases 🌬️
    • Liquids 🌊
    • Solids 🌲

Fun Fact: When you listen to your favorite song on your phone, it's sound waves traveling from your device to your ears!

What can these materials do with sound waves?

  • Gases
    • Can't sustain displacement at right angles to the energy direction.
    • Why? No restoring force.
  • Liquids
    • Only at their surfaces can they sustain displacement at right angles.
  • Solids
    • Can transmit both transverse and longitudinal waves.
    • Why? Atoms and molecules are bonded.

Real-world Example: Imagine a trampoline (solid) vs. a pool of water (liquid). You can bounce in different directions on a trampoline, but you can only make splashes on the surface of the water!

How do sound waves move? 🚀

  • Inside devices like smartphones, a flexible material moves back and forth with the frequency of the sound.
  • This movement creates high and low-pressure regions in the nearby air.
  • These pressure regions then move as a longitudinal traveling wave.

Did you know? The waves decrease in amplitude (size) as they move further out because they spread and lose some energy as heat!

Understanding the graph

  • π 2 rad = phase difference between compressions and corresponding displacement maxima.
  • Maximum particle displacement is when the pressure is average.
  • No particle displacement? Pressure is maximum difference from atmospheric pressure.
  • Pressure goes up and down in one cycle.

Real-world Example: Think of it like a roller coaster. The top of a loop is max displacement, while the bottom is no displacement!

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IB Resources
Theme C - Wave Behaviour
Physics SL
Physics SL

Theme C - Wave Behaviour

Unlocking The Secrets Of Sound Waves: From Smartphone To Ear

Word Count Emoji
663 words
Reading Time Emoji
4 mins read
Updated at Emoji
Last edited on 5th Nov 2024

Table of content

What are sound waves? 🎵

  • Sound waves = Longitudinal waves
  • They can move through
    • Gases 🌬️
    • Liquids 🌊
    • Solids 🌲

Fun Fact: When you listen to your favorite song on your phone, it's sound waves traveling from your device to your ears!

What can these materials do with sound waves?

  • Gases
    • Can't sustain displacement at right angles to the energy direction.
    • Why? No restoring force.
  • Liquids
    • Only at their surfaces can they sustain displacement at right angles.
  • Solids
    • Can transmit both transverse and longitudinal waves.
    • Why? Atoms and molecules are bonded.

Real-world Example: Imagine a trampoline (solid) vs. a pool of water (liquid). You can bounce in different directions on a trampoline, but you can only make splashes on the surface of the water!

How do sound waves move? 🚀

  • Inside devices like smartphones, a flexible material moves back and forth with the frequency of the sound.
  • This movement creates high and low-pressure regions in the nearby air.
  • These pressure regions then move as a longitudinal traveling wave.

Did you know? The waves decrease in amplitude (size) as they move further out because they spread and lose some energy as heat!

Understanding the graph

  • π 2 rad = phase difference between compressions and corresponding displacement maxima.
  • Maximum particle displacement is when the pressure is average.
  • No particle displacement? Pressure is maximum difference from atmospheric pressure.
  • Pressure goes up and down in one cycle.

Real-world Example: Think of it like a roller coaster. The top of a loop is max displacement, while the bottom is no displacement!

Unlock the Full Content! File Is Locked Emoji

Dive deeper and gain exclusive access to premium files of Physics SL. Subscribe now and get closer to that 45 🌟

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