Wave Interference & Superposition – AP Physics 1 | ShowMeClass

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Wave Interference & Superposition

AP Physics 1 · Unit 10: Mechanical Waves

Key Objectives

Observe constructing interference where wave crests align (Antinodal lines).

Identify perfectly still, flat regions caused by destructive interference (Nodal lines).

Drag the yellow probe across the surface to instantly graph the superposed wave amplitude.

Equations

Constructive ($\Delta L = m\lambda$)
Destructive ($\Delta L = (m+0.5)\lambda$)

Superposition Interference Wavelength Nodal Lines

Time ($t$)0.0 s

💡 Drag the Yellow Probe on the water to capture the wave graph

Detector Probe Amplitude vs Time // $y(t)$

Wavelength ($\lambda$) 2.0 m

Frequency ($f$) 1.0 Hz

Source Separation ($d$) 5.0 m

Distance between the two red source emitters.

Phase Difference ($\Delta \phi$) 0°

Degrees by which Source 2 leads Source 1. (180 = Out of phase)

Probe Math

          Path 1 ($r_1$): 0.0 m

          Path 2 ($r_2$): 0.0 m

          Path Diff ($\Delta L$): 0.0 m