Frequency & Waves
Frequency
1.00 Hz
Wavelength
Wave Speed
Period
1.00 s
Amplitude
1.00
Frequency 1.0 Hz
Amplitude 1.0
Wave Speed 1.0×
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Frequency

The number of complete wave cycles that pass a fixed point per second. Measured in Hertz (Hz). Higher frequency means more cycles per second and a higher-pitched sound.

f = 1 / T

Wavelength

The distance between two adjacent points in phase — for example, crest to crest or trough to trough. Symbol: λ (lambda). Measured in metres.

λ = v / f

Wave Speed

How fast the wave travels through a medium. It depends on the medium — not the source. All electromagnetic waves travel at c = 3×10⁸ m/s in a vacuum.

v = f × λ

Period

The time taken for one complete oscillation. Period and frequency are reciprocals: doubling the frequency halves the period.

T = 1 / f

Amplitude

The maximum displacement from the equilibrium position. Amplitude is related to the energy carried by a wave — larger amplitude = more energy.

Superposition

When two waves overlap, the resultant displacement is the sum of individual displacements. Constructive interference increases amplitude; destructive interference reduces it.

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