3.1 Progressive waves

• Longitudinal waves require a medium to travel.


  True
• Sound waves are an example of transverse waves.

  False
• The wavelength of a wave is the distance between two successive crests or troughs.
• Match the characteristic with its formula:

  Frequency ↔️ $f =$$\frac{1}{T}$

  Wave Speed ↔️ $v =$$f \lambda$
• Transverse waves can travel in a vacuum.


  True
• Transverse waves can travel in a vacuum.


  True
• Longitudinal waves move particles parallel to the direction of wave propagation.


  True
• The frequency of a wave is the inverse of its time period.

  True
• What is a progressive wave?

  A disturbance carrying energy
• Match the wave type with its characteristic:

  Transverse Wave ↔️ Crests and troughs

  Longitudinal Wave ↔️ Compressions and rarefactions
• Order the differences between transverse and longitudinal waves:

  1️⃣ Particle motion

  2️⃣ Medium of propagation

  3️⃣ Wave components
• Wave speed is calculated using the formula $v =$$f \lambda$.


  True
• How do particles move in a transverse wave?

  Perpendicular to direction
• What is the medium requirement for longitudinal waves?

  Solids, liquids, and gases
• Match the type of wave with its example:

  Transverse Waves ↔️ Light Waves

  Longitudinal Waves ↔️ Sound Waves
• What is the maximum displacement of a particle from its equilibrium position called?

  Amplitude
• What formula describes the relationship between wave speed, frequency, and wavelength?

  $v =$$f \lambda$
• What is the direction of particle motion in longitudinal waves relative to wave propagation?

  Parallel
• What unit is used to measure the frequency of a wave?

  Hertz
• The maximum displacement of a particle from its equilibrium position in a wave is called the amplitude
• In transverse waves, particles move perpendicular to the direction of wave propagation.


  True
• Amplitude is measured in meters.

  True
• The wave speed formula is $v =$$f \lambda$.


  True
• What is the formula for frequency in terms of the time period?

  $f =$$\frac{1}{T}$
• What does the wave equation $v =$$f \lambda$ describe?


  Wave speed, frequency, and wavelength relationship
• Sound waves are transverse waves.

  False
• Sound waves create alternating regions of compression and rarefaction.


  True
• Give an example of a progressive wave.

  Water waves on a calm lake
• In transverse waves, particles move perpendicular to the direction of wave propagation.
• Which waves can travel in a vacuum?

  Transverse waves
• What is the definition of amplitude in a wave?

  Maximum particle displacement
• Light waves are an example of transverse waves.
• Transverse waves move particles perpendicular
• Longitudinal waves consist of compressions and rarefactions
• The distance between two successive crests or troughs is called the wavelength
• The wave speed is measured in m/s
• Longitudinal waves require a medium
• The time period of a wave is measured in seconds
• The wavelength of a wave is measured in meters.


  True
• Wave speed is calculated by multiplying frequency and wavelength.


  True