---
title: "Constructive Interference — AP Physics 1 Definition & Guide"
description: "Constructive interference is when overlapping waves add to form a bigger amplitude. It's how standing waves and harmonics form in AP Physics 1 Unit 10."
canonical: "https://fiveable.me/ap-physics-1-revised/key-terms/constructive-interference"
type: "key-term"
subject: "AP Physics 1"
---

# Constructive Interference — AP Physics 1 Definition & Guide

## Definition

Constructive interference occurs when two or more waves combine to create a larger amplitude, resulting in an increase in the overall intensity of the wave.

## Related Study Guides

- [10.3 Interference and Superposition (Waves in Tubes and on Strings)](/ap-physics-1-revised/unit-10/interference-superposition-waves-tubes-strings/study-guide/fTRAI84IoL6Eh3789yX9)

## Review

### Related Terms

- Destructive interference: Destructive interference happens when two or more waves combine to create a smaller amplitude, resulting in a decrease in the overall intensity of the wave.
- Superposition principle: The superposition principle states that when multiple waves overlap, the total displacement at any point is equal to the sum of displacements caused by each individual wave.
- Interference pattern: An interference pattern is a pattern formed by overlapping waves that have undergone either constructive or destructive interference. It can be observed in phenomena like diffraction and double-slit experiments.