Transverse Pulses and Waves

Understanding how energy travels through media - from single pulses to continuous waves

Grade 10 Physical Sciences

Key Concept: A pulse is a single disturbance, while a wave is a succession of pulses. In transverse waves, particles vibrate perpendicular to the direction of energy transfer.

1. Transverse Pulses

A pulse is defined as a single disturbance in a medium. In transverse pulses, particles move at right angles to the pulse direction.

Interactive Pulse Simulator

Click buttons to create pulses of different amplitudes

Pulse Properties

Amplitude (A)

Definition:Maximum displacement from rest

Unit:meters (m)

Represents:Height/strength of pulse

Pulse Length

Definition:Distance from start to end

Unit:meters (m)

Represents:How long the pulse is

Pulse Speed

v = d / t

v = pulse speed (m·s⁻¹)

d = distance traveled (m)

t = time taken (s)

Pulse Speed Calculator

Distance (m):

Time (s):

Speed: 4 m·s⁻¹

2. Superposition of Pulses

Principle of Superposition: The resultant displacement at any point is the algebraic sum of the displacements of individual pulses.

Try It Yourself

Constructive

Types of Interference

Constructive Interference

Pulses on same side of rest position
Amplitudes add together
Result is larger pulse

Destructive Interference

Pulses on opposite sides
Amplitudes subtract
Can cancel completely if equal

Two pulses of amplitude +3 cm and -3 cm meet. What happens?

3. Transverse Waves

A transverse wave is a succession of pulses, creating a periodic disturbance in the medium.

Wave Features

Crests and Troughs

Crest:Highest point of wave

Trough:Lowest point of wave

Wavelength (λ)

Definition:Distance between successive crests

Unit:meters (m)

Frequency (f)

Definition:Number of cycles per second

Unit:Hertz (Hz)

Period (T)

Definition:Time for one complete cycle

Formula:T = 1/f

Unit:seconds (s)

Points in Phase

Points that are at the same position in their cycle and moving in the same direction (e.g., two crests or two troughs).

Period-Frequency Converter

Frequency (Hz):

Period: 0.2 s

4. The Wave Equation

v = f × λ

v = wave speed (m·s⁻¹)

f = frequency (Hz)

λ = wavelength (m)

Wave Equation Solver

Enter any two values to calculate the third:

Wave Speed (m·s⁻¹):

Frequency (Hz):

Wavelength (m):

Speed Challenge

A wave has a frequency of 50 Hz and a wavelength of 2 m. What is its speed?

Match the Terms

Amplitude

Wavelength

Frequency

Period

Maximum displacement from rest

Distance between successive crests

Number of cycles per second

Time for one complete cycle

Complete the Sentences

A transverse wave has particles moving to the wave direction.

The highest points of a wave are called .

When two pulses on the same side meet, we get interference.

Test Your Understanding

1. What is the amplitude of a wave?

2. The wave equation is:

3. What happens when two equal pulses on opposite sides meet?

4. A wave has frequency 10 Hz and wavelength 3 m. What is its speed?

Key Terms

Pulse Amplitude Superposition Constructive Destructive Crest Trough Wavelength Frequency Period Wave equation In phase

Key Takeaways

A pulse is a single disturbance; a wave is a succession of pulses
Amplitude = maximum displacement from rest position
Superposition: resultant = algebraic sum of individual displacements
Constructive interference: pulses on same side add
Destructive interference: pulses on opposite sides subtract
Crest = highest point, Trough = lowest point
Wavelength (λ) = distance between successive crests
Frequency (f) = number of cycles per second (Hz)
Period (T) = 1/f = time for one cycle
Wave equation: v = f × λ

Waves, Sound & Light Longitudinal Waves