2.1.1 Types of Waves

• What are mechanical waves?

  Disturbances requiring a medium
• What are examples of mechanical waves?

  Sound, water, seismic waves
• Mechanical waves can travel through a vacuum.

  False
• How are electromagnetic waves created?

  Oscillation of electric and magnetic fields
• What is the medium required for mechanical waves to travel?

  Solid, liquid, or gas
• Electromagnetic waves can travel through a vacuum
• Electromagnetic waves are created by the oscillation of electric and magnetic fields.


  True
• Sound waves are an example of longitudinal waves.

  True
• Seismic waves are an example of mechanical
• Match the type of wave with its medium requirement:

  Mechanical ↔️ Yes

  Electromagnetic ↔️ No
• What is the direction of disturbance in a transverse wave compared to its propagation direction?

  Perpendicular
• Which type of wave has particles moving back and forth in the same direction as the wave travel?

  Longitudinal
• Mechanical waves require a medium
• Mechanical waves cannot propagate through a vacuum
• Electromagnetic waves require a medium to travel.

  False
• What is required for mechanical waves to travel?

  A medium
• In longitudinal waves, the disturbance is parallel