P5.1 Wave Behaviour

• What are waves in matter?

  Disturbances transferring energy
• Waves in matter permanently move the material they pass through.

  False
• In transverse waves, how do particles move relative to the wave direction?

  Perpendicular
• The amplitude of a wave is the maximum displacement from its resting position.
• What is the frequency of a wave?

  Cycles per unit time
• Match the wave property with its definition:

  Amplitude ↔️ Maximum displacement from rest

  Wavelength ↔️ Distance between crests

  Frequency ↔️ Cycles per unit time

  Wave speed ↔️ Speed of wave propagation
• What is the superposition principle?

  Combination of waves
• Destructive interference can completely cancel out waves if they are out-of-phase.

  True
• The angle of reflection is equal to the angle of incidence.
• Wave refraction occurs because the wave speed changes between mediums.

  True
• What is the relationship between the angles of incidence and reflection?

  They are equal
• What are waves in matter?

  Disturbances transferring energy
• Longitudinal waves have particles that move parallel to the wave direction.


  True
• The wavelength of a wave is the distance between two consecutive wave crests or troughs
• Match the interference type with its description:

  Constructive Interference ↔️ Waves combine in-phase, amplitude increases

  Destructive Interference ↔️ Waves combine out-of-phase, amplitude decreases
• Refraction occurs when a wave passes from one medium to another with a different speed
• What happens to a wave's direction during refraction?

  It changes direction
• What is wave diffraction?

  Bending of waves around obstacles
• Waves in matter transfer energy without permanently moving the material
• Match the wave type with its particle motion and energy transfer:

  Transverse Waves ↔️ Perpendicular motion ||| Perpendicular energy transfer

  Longitudinal Waves ↔️ Parallel motion ||| Parallel energy transfer
• What is an example of a longitudinal wave?

  Sound waves
• Wavelength is the distance between two consecutive wave crests or troughs.

  True
• Wave speed is the speed at which the wave propagates through the medium.
• Constructive interference occurs when waves combine in-phase.
• What happens to a wave during reflection?

  It reflects back
• What is wave refraction?

  Change in direction
• What is the cause of wave reflection?

  Encounter with a boundary
• In wave reflection, the wave reflects back into the original medium.
• In transverse waves, particles move perpendicular
• What is the definition of amplitude in wave properties?

  Maximum wave displacement
• Wavelength and frequency are inversely related in a wave.


  True
• What is wave reflection?

  Wave encounters a boundary
• In reflection, the angle of incidence equals the angle of reflection.


  True
• Match the wave type with its particle motion and energy transfer:

  Transverse Waves ↔️ Perpendicular particle motion, perpendicular energy transfer

  Longitudinal Waves ↔️ Parallel particle motion, parallel energy transfer
• Waves with longer wavelengths diffract more significantly around obstacles than waves with shorter wavelengths.

  True