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THE VISUAL LEARNING STUDIO
See the idea. Understand the connection.
35 visual explanations across 29 chapters, with topic maps throughout the library.
The chapter index will grow as additional notes are prepared. Chapters shown here are a learning collection, not a claim that the entire exam syllabus is complete.
SEE IT. CONNECT IT. EXPLAIN IT.
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Study the expanded notes and the credited detailed textbook lessons. The current chapter index covers core topics; it is not a claim of exhaustive coverage of every examination syllabus. Check the official syllabus and primary references.
Waves — lesson overview
Wave quantities
A wave transfers a disturbance and energy without requiring bulk transport of the medium over the entire propagation distance.
Wavelength is spatial repetition distance; frequency is cycles per unit time; period T = 1/f. Wave speed satisfies v = fλ for the described periodic wave.
Particles of a medium may oscillate while the disturbance propagates; their oscillation speed is not the same quantity as wave speed.
Types and medium
In transverse waves, disturbance is perpendicular to propagation; in longitudinal waves it is parallel, as with pressure variations in sound in air.
Mechanical waves need a medium. Electromagnetic waves can propagate in vacuum, so they are not all mechanical waves.
Changing medium can change speed and wavelength, while frequency is normally fixed by the source across a stationary boundary.
Superposition and example
Superposition adds disturbances where a linear-wave approximation applies, producing constructive or destructive interference according to relative phase.
For sound speed 340 m s⁻¹ and frequency 170 Hz, wavelength is 2 m. A 340 Hz sound in the same medium has wavelength 1 m.
Resonance occurs when a driven system responds strongly near a natural frequency, with damping influencing the response.
