Podcast
Questions and Answers
What is a wave?
What is a wave?
Which type of wave has the direction of vibration parallel to the propagation of the wave?
Which type of wave has the direction of vibration parallel to the propagation of the wave?
What type of wave needs a medium to travel through?
What type of wave needs a medium to travel through?
What is the SI unit of wavelength?
What is the SI unit of wavelength?
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What is the frequency of a wave?
What is the frequency of a wave?
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What is the amplitude of a wave?
What is the amplitude of a wave?
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What type of wave is an electromagnetic wave?
What type of wave is an electromagnetic wave?
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What is the highest point on a transverse wave?
What is the highest point on a transverse wave?
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What is the product of wavelength and frequency?
What is the product of wavelength and frequency?
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What is the formula used to calculate the speed of a wave?
What is the formula used to calculate the speed of a wave?
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What is the S.I unit of the velocity of a wave?
What is the S.I unit of the velocity of a wave?
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What is the disturbance by one complete vibration of the source?
What is the disturbance by one complete vibration of the source?
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Study Notes
Waves
- A wave is a disturbance that carries energy from one place to another.
Types of Waves
- Transverse waves: direction of vibration is perpendicular to the propagation of the wave.
- Examples: electromagnetic waves, radio waves, water waves, rope waves.
- Longitudinal waves: direction of vibration is parallel to the propagation of the wave.
- Examples: sound waves, slinky compression waves.
Mechanical Waves
- Mechanical waves are the vibration of particles.
- They need a medium to travel through.
- A travelling mechanical wave is a disturbance carrying energy through a medium without any overall motion of that medium.
Wave Characteristics
- Periodic waves: a type of wave in which the pattern of disturbance repeats regularly over time.
- Wavelength (λ): the distance from a point on a wave to the corresponding point on an adjacent wave.
- Measured from crest to next crest or trough to trough.
- S.I. unit: Metre (m)
- Frequency (f): the number of waves passing a point per second.
- S.I. unit: Hertz (Hz)
- Amplitude (A): the maximum distance from the undisturbed position.
Wave Characteristics
- A crest is the highest point on a transverse wave
- A trough is the lowest point on a transverse wave
Oscillation and Cycle
- An oscillation (or cycle) is the disturbance by one complete vibration of the source
Wave Velocity
- The velocity of a wave (c) is the product of wavelength and frequency
- Formula to calculate wave speed: c = λf
- S.I. Unit of wave speed: Metre per second (m/s)
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Description
Learn about the different types of waves, including transverse and longitudinal waves, and their characteristics. Understand the definition of mechanical waves and their properties.
