14.1 Wave Properties

• What is a wave in physics terms?

  A disturbance transporting energy
• Frequency is measured in units called Hertz
• Wavelength is measured in units of meters
• What is the speed of a wave with a frequency of 5 Hz and a wavelength of 2 meters?

  10 m/s
• What is the primary function of a wave?

  Transport energy
• What is the maximum displacement from the rest position in a wave called?

  Amplitude
• What type of waves have disturbances that are perpendicular to the direction of wave travel?

  Transverse waves
• Longitudinal waves require a medium such as a gas, liquid, or solid
• What happens to the amplitude when two waves undergo constructive interference?

  Increases
• Destructive interference occurs when waves are in phase.

  False
• In optics, constructive interference increases the intensity of light
• Longer wavelengths diffract more than shorter wavelengths
• What is an example of diffraction in everyday life?

  Sound waves around buildings
• Sound waves are an example of longitudinal waves.


  True
• Transverse waves require a medium to travel through.

  False
• What is the main difference between transverse and longitudinal waves in terms of disturbance direction?

  Perpendicular vs. Parallel
• Match the wave characteristic with its symbol and unit:

  Wavelength ↔️ $\lambda$, meters

  Frequency ↔️ $f$, Hertz

  Amplitude ↔️ $A$, meters

  Speed ↔️ $v$, meters per second
• Arrange the steps in constructive interference in order:

  1️⃣ Waves are in phase

  2️⃣ Displacements add together

  3️⃣ Amplitude increases
• What two factors determine the degree of diffraction?

  Wavelength and opening size
• Match the wave characteristic with its description:

  Amplitude ↔️ Maximum displacement from rest position

  Wavelength ↔️ Distance between crests or troughs

  Frequency ↔️ Cycles per unit time
• Match the wave property with its correct description:

  Disturbance ↔️ Perpendicular or parallel

  Medium Required ↔️ Needed for longitudinal waves

  Example ↔️ Sound or light waves
• Wave speed is measured in units of m/s
• Match the wave characteristic with its symbol:

  Wave Speed ↔️ $v$

  Frequency ↔️ $f$

  Wavelength ↔️ $\lambda$
• Arrange the key characteristics of waves in order of their relevance to wave behavior:

  1️⃣ Amplitude

  2️⃣ Wavelength

  3️⃣ Frequency

  4️⃣ Period
• Match the wave type with its property:

  Transverse Waves ↔️ Disturbance is perpendicular

  Longitudinal Waves ↔️ Disturbance is parallel
• What is the direction of disturbance in transverse waves relative to the wave direction?

  Perpendicular
• Superposition can only result in constructive interference.

  False
• What happens to the amplitude during constructive interference?

  Increases
• Destructive interference occurs when the crest of one wave aligns with the crest of another.

  False
• What is diffraction?

  Bending of waves
• Smaller openings or obstacles lead to more diffraction
• What type of wave has disturbances perpendicular to the direction of propagation?

  Transverse wave
• Sound waves are an example of longitudinal waves.


  True
• In longitudinal waves, particle motion is parallel to the wave direction.

  True
• If a wave's frequency increases but its speed remains constant, its wavelength decreases.


  True
• Wave speed is measured in meters per second (m/s).


  True
• Sound waves are an example of longitudinal waves.

  True
• The period of a wave is the time for one complete wave cycle.


  True
• The particle motion in transverse waves is parallel to the direction of wave travel.

  False
• What is the relationship between wave speed, frequency, and wavelength according to the wave equation?

  $v =$$f \lambda$