Stationary Waves Flashcards

(16 cards)

1
Q

What are stationary waves?

A

Stationary waves can be thought of as two progressive waves moving in opposite directions and superimposed one on the other, resulting in a fixed pattern of nodes and antinodes.

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2
Q

What are nodes in a stationary wave?

A

Nodes have minimum (ideally zero) oscillation.

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3
Q

What are antinodes in a stationary wave?

A

Antinodes are points of maximum amplitude.

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4
Q

What is the distance between a node and the adjacent antinode in a stationary wave?

A

The distance is a quarter wavelength.

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5
Q

What is the role of resonators in wave energy?

A

Resonators store wave energy by reflecting the wave back on itself to form a stationary wave pattern.

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6
Q

What condition allows resonators to efficiently receive energy?

A

Resonators only efficiently receive energy from an external source that has a frequency close to one of their own natural frequencies, known as resonance.

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7
Q

What is a fundamental mode of oscillation in resonators?

A

The fundamental mode is the lowest natural mode of oscillation.

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8
Q

What can resonance cause if not properly managed?

A

Resonance can be damaging.

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9
Q

What happens if vehicle wheels are not carefully balanced?

A

They may resonate with the natural frequency of the steering or suspension, causing dangerous vibrations.

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10
Q

How does a microwave oven utilize resonance?

A

A resonant cavity is used to build up microwave power, creating hot spots (antinodes) and cold spots (nodes) inside the oven.

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11
Q

Why is food rotated in a microwave oven?

A

Food is rotated to achieve even cooking due to the presence of hot and cold spots.

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12
Q

What is the significance of stationary wave resonators in musical instruments?

A

Musical instruments use stationary wave resonators to enhance sound production.

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13
Q

Fill in the blank: A stationary wave is formed by the _______ of two progressive waves moving in opposite directions.

A

superposition

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14
Q

True or False: Antinodes are points of minimum amplitude in a stationary wave.

A

False

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15
Q

List two differences that distinguish a stationary wave from a progressive wave.

A
  • Stationary waves have fixed nodes and antinodes
  • Progressive waves transfer energy continuously without forming fixed points.
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16
Q

Explain how and why TV antennas make use of stationary waves.

A

TV antennas utilize stationary waves to optimally capture signals, with the design tailored to the wavelength of the TV signal.