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Difficulty: MediumProduction, Propagation, and Classification of Waves

Match each wave phenomenon on the left with its accurate wave classification and propagation mechanism on the right.

  • Sound wave propagating through airLongitudinal mechanical wave consisting of compressions and rarefactions requiring a material medium
  • Light wave traveling across a vacuumTransverse electromagnetic wave consisting of oscillating electric and magnetic fields that needs no medium
  • Transverse ripple on a stretched stringTransverse mechanical wave where medium particles vibrate perpendicular to wave propagation direction
  • Primary seismic P-wave moving through Earth's mantleFast-moving longitudinal body wave where rock particles vibrate parallel to energy transmission

Answer

Sound waves in air correspond to longitudinal mechanical waves requiring a material medium. Light waves traveling through a vacuum correspond to transverse electromagnetic waves needing no material medium. Ripples on a stretched string correspond to transverse mechanical waves with perpendicular particle vibration. Primary seismic P-waves correspond to longitudinal body waves with parallel particle movement.
Sound in air and seismic P-waves are longitudinal mechanical waves because medium particles vibrate parallel to the direction of propagation. Light is a transverse electromagnetic wave because it propagates via perpendicular field oscillations without needing a material medium. Waves on a string are transverse mechanical waves because string segments vibrate perpendicular to the length of the string.

Step-by-Step Solution

1
Analyze medium dependence
Sound, string waves, and seismic P-waves require a material medium (mechanical waves), whereas light waves travel through a vacuum (electromagnetic waves).
Waves are broadly categorized as mechanical or non-mechanical (electromagnetic) based on whether they require a physical medium for propagation.
2
Analyze particle motion relative to wave propagation
Sound and P-waves oscillate parallel to propagation (longitudinal); light waves and string vibrations oscillate perpendicular to propagation (transverse).
Direction of medium displacement relative to energy transmission determines whether a wave is transverse or longitudinal.
3
Match each physical scenario to its unique classification pair
Match sound wave to longitudinal mechanical, light to transverse electromagnetic, string wave to transverse mechanical, and seismic P-wave to longitudinal body wave.
Synthesize medium dependence and displacement direction for each specific physical system.

Key Concept

Classification of waves based on material medium dependence (mechanical vs. electromagnetic) and particle oscillation direction (transverse vs. longitudinal).
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Topics

Production, Propagation, and Classification of Waves

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