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Questions and Answers
What is a 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 is the SI unit of wavelength?
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What is the frequency of a wave?
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What is the amplitude of a wave?
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What type of wave is an electromagnetic wave?
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What is the highest point on a transverse wave?
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What is the product of wavelength and frequency?
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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?
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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.
