Multiple Choice
Which of the following wave properties are exhibited by particles according to quantum mechanics?
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18. Waves & Sound
Wave Functions
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Which of the following is a key difference between an electromagnetic wave and a mechanical wave?
A
Mechanical waves can travel through a vacuum, while electromagnetic waves require a medium to propagate.
B
Both electromagnetic and mechanical waves require a medium to propagate.
C
Electromagnetic waves can travel through a vacuum, while mechanical waves require a medium to propagate.
D
Electromagnetic waves cannot transfer energy, while mechanical waves can.
Verified step by step guidance1
Step 1: Understand the nature of mechanical waves. Mechanical waves require a medium (such as air, water, or a solid) to travel through because they propagate by causing particles in the medium to vibrate.
Step 2: Understand the nature of electromagnetic waves. Electromagnetic waves consist of oscillating electric and magnetic fields and do not require a medium; they can travel through the vacuum of space.
Step 3: Compare the propagation requirements. Mechanical waves cannot travel through a vacuum because there are no particles to vibrate, whereas electromagnetic waves can propagate through empty space.
Step 4: Analyze the energy transfer aspect. Both types of waves transfer energy, but the key difference lies in their medium requirement, not in their ability to transfer energy.
Step 5: Conclude that the key difference is that electromagnetic waves can travel through a vacuum, while mechanical waves require a medium to propagate.
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