# Chapter 13: Waves Kendra Yap

gce 'o' level singapore waves

Get Started. It's Free Chapter 13: Waves ## 1. What is a wave?

### 1.2. made up of periodic motion

1.2.1. motion repeated at regular intervals

1.2.2. e.g. swinging motion of pendulum

## 2. properties of wave motion

### 2.1. distance

2.1.1. crest

2.1.1.1. highest points of transverse wave

2.1.2. trough

2.1.2.1. lowest points of transverse wave

2.1.3. wavelength (m)

2.1.3.1. shortest distance between any 2 points in phase

2.1.4. amplitude A (m)

2.1.4.1. the maximum displacement of a point from its rest position

2.1.4.2. Amplitude of transverse wave = height of crest/depth of trough from rest position

### 2.2. time

2.2.1. period T (s)

2.2.1.1. time taken to produce one complete wave

2.2.1.2. = to time taken for the wave to travel through a distance equal to its wavelength

2.2.2. frequency f (Hz)

2.2.2.1. number of complete waves produced per second

2.2.2.2. = the number of crests or troughs that go past a point per second

2.2.2.3. f = 1/T

2.2.3. wave speed v (m/s)

2.2.3.1. the distance traveled by a wave per second

2.2.3.2. v = 入/T

2.2.3.3. v = f入

### 2.3. wave front

2.3.1. imaginary line on a wave that joins all adjacent points that are in phase

## 4. Longitudinal waves

### 4.1. waves that travel parallel to the direction of the vibration

4.1.1. motion of the individual particles of wave are parallel to the direction of propagation of a wave

## 6. wave scenarios

### 6.1. waves in spring

6.1.1. left-to-right

6.1.2. push-and-pull