Questions and Answers
What determines the resonant frequency of an object?
What is the amplitude of a vibrating object?
Why does resonance not occur if the vibrating frequency does not match the resonant frequency of the item?
What is an example of resonance in everyday life?
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What is the Latin root of the word 'resonance'?
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What is a common characteristic of standing waves?
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What is the purpose of resonance in musical instruments?
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What happens when a light wave hits an object that is not at its resonant frequency?
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What is the function of a capacitor in an RLC circuit?
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What is the term for the points on a standing wave that do not move?
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What happens when the light wave frequency matches the resonant frequency of the object?
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Why is the blue color of a blue ball visible to humans?
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What happens to the light wave in transparent objects?
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When a light wave causes a short vibration in an object, what happens next?
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Why do objects appear in different colors?
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Study Notes
What is Resonance?
- Resonance occurs when a vibrating object causes another nearby object to start vibrating at a higher amplitude.
- Resonance is possible because objects and systems naturally vibrate at a definitive frequency, called the resonant frequency or natural frequency.
- The resonant frequency is determined by the size and shape of the object, along with the material it is made from.
- Resonance occurs when the frequency of an initial object's external vibration matches the resonant frequency of a second object, resulting in a higher amplitude vibration.
When Does Resonance Occur?
- Resonance occurs when an item oscillates or vibrates in response to exposure of oscillations at a frequency that matches or is close to matching its resonant frequency.
- Resonance will not occur if the vibrating frequency does not match the resonant frequency of the item.
Wave Resonance
- A wave is a disturbance that moves through a material from a given point to another point.
- A standing wave is a wave that is associated with resonance, resulting from two separate waves with matching frequencies and moving in opposing trajectories interfering with each other.
- Standing waves do not appear to travel and appear to oscillate in place.
- Standing waves feature two points along the wave that do not move, called nodes, and points where the standing wave has the largest amplitude, called antinodes.
Examples of Resonance
- Resonance can be observed in RLC circuits, musical instruments, and light waves.
- In RLC circuits, resonance happens when the induction and capacitance are the same in magnitude, but negate one another, resulting in the highest amount of power being transferred.
- In musical instruments, resonance amplifies sound waves to create louder sounds, resulting from an item vibrating after being exposed to sound waves at the resonant frequency.
- In light waves, resonance occurs when the frequency of the light wave matches the resonant frequency of the object, resulting in absorption of the light wave.
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Description
Learn about resonance in physics, including the definition, amplitude, and resonant frequency. Understand how objects and systems vibrate at a definitive frequency.