# Introduction to Wave Features

• Waves are disturbances that transfer energy from one point to another without transporting matter.
• They can be classified based on their direction of motion into longitudinal and transverse waves.
• Fundamental terms in wave physics include wave frequency, amplitude, wavelength and velocity.

# Wave Representation on Graphs

• A waveform graph is a visual representation of a wave.
• The x-axis usually represents time (t) or position (x), while the y-axis represents displacement (y) or amplitude (A).

# Identifying Wave Features on Graphs

• The wave crest is the point on the wave with the maximum value or the highest point. Contrarily, the wave trough is the minimum value or lowest point.
• The amplitude of a wave, denoted by ‘A’, is the maximum displacement from its rest position. On the wave graph, it’s the vertical distance from the rest position to a crest or a trough.
• A wavelength denoted by ‘λ’, is the distance between two identical points in the wave, such as from crest to crest or trough to trough.
• Wave period is the time taken to complete one wave cycle and is denoted by ‘T’. It’s the horizontal distance for one complete wave on a time-displacement graph.
• The frequency of a wave, represented by ‘f’, is the number of wavelengths that pass a point each second. It is the inverse of the period (f=1/T).

# Constructing and Interpreting Wave Diagrams

• Consider using different colours or symbols to represent different features of the wave.
• Always label the X and Y axes, including units.
• Mark and label the wavelength, amplitude and indicate a complete wave cycle.
• Use appropriate scale to accurately reflect the values you are representing.

Understanding how waves are represented on graphs is crucial, not just for the theoretical aspects but also for practical applications. They can be used to represent various phenomena, from sound waves in music to light waves in optics, even seismic waves in earth science.