Physics Chapter 11: Waves Flashcards
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Questions and Answers

Which of the following relate to sound waves?

  • Sound waves can travel through a vacuum
  • Sound waves are electromagnetic waves
  • Sound waves involve energy transport (correct)
  • Sound waves require a medium (correct)
  • Which of the following relate to light waves?

  • Light waves can travel through a vacuum (correct)
  • Light waves have no frequency
  • Light waves are electromagnetic waves (correct)
  • Light waves require a medium
  • Which of the following relate to water waves?

  • Water waves transport energy but not water (correct)
  • Water waves require a medium (correct)
  • Water waves can exist in a vacuum
  • Water waves are examples of longitudinal waves
  • What is the medium that seismic waves travel through?

    <p>Rocks and other materials inside the Earth</p> Signup and view all the answers

    Sound waves are an example of transverse waves.

    <p>False</p> Signup and view all the answers

    Light waves are an example of transverse waves.

    <p>True</p> Signup and view all the answers

    A wave transports energy but not matter.

    <p>True</p> Signup and view all the answers

    Visible light waves require a medium in which to travel.

    <p>False</p> Signup and view all the answers

    Radio waves are an example of electromagnetic waves.

    <p>True</p> Signup and view all the answers

    Sound waves are an example of longitudinal waves.

    <p>True</p> Signup and view all the answers

    A wave that requires a medium is called a ___ wave.

    <p>mechanical</p> Signup and view all the answers

    A wave that causes the particles of the medium to vibrate perpendicular to the direction the wave travels is a ___ wave.

    <p>transverse</p> Signup and view all the answers

    A wave that causes the particles of the medium to vibrate parallel to the direction the wave travels is called a ___ wave.

    <p>longitudinal</p> Signup and view all the answers

    What is the frequency of a wave that has a period of 0.25 seconds?

    <p>4 Hz</p> Signup and view all the answers

    What is the period of a wave if it breaks every 5 seconds?

    <p>5 seconds</p> Signup and view all the answers

    What is the wavelength of the wave indicated in the above diagram?

    <p>1.5 m</p> Signup and view all the answers

    What is the amplitude of the above wave?

    <p>0.5</p> Signup and view all the answers

    What is the wavelength of a wave that is moving at a speed of 30 m/s with a frequency of 10 Hz?

    <p>3 m</p> Signup and view all the answers

    What does the frequency of a sound wave determine?

    <p>The pitch of the sound</p> Signup and view all the answers

    How loud a sound is depends on what?

    <p>The amplitude of the waves</p> Signup and view all the answers

    What is the difference between visible light and x-rays?

    <p>The frequency of x-rays is greater</p> Signup and view all the answers

    What kind of curve is a good mathematical model for representing transverse waves?

    <p>Sine curve</p> Signup and view all the answers

    The color of light is determined by what?

    <p>The frequency of the light rays</p> Signup and view all the answers

    A wave with a frequency of 0.5 Hz and a speed of 10 m/s has a wavelength of what?

    <p>20 m</p> Signup and view all the answers

    The greater the frequency of the wave in a particular medium, the greater the speed of the wave.

    <p>True</p> Signup and view all the answers

    The energy of a mechanical wave depends on the amplitude of the wave.

    <p>True</p> Signup and view all the answers

    As the period of the wave increases, the frequency increases.

    <p>False</p> Signup and view all the answers

    The color of visible light depends on the wavelength of the light.

    <p>True</p> Signup and view all the answers

    What do you call the highest point of a transverse wave?

    <p>Crest</p> Signup and view all the answers

    What do you call the greatest distance that particles in a medium move from their normal position when in a wave?

    <p>Amplitude</p> Signup and view all the answers

    What do you call the time required for one full wavelength to pass a certain point?

    <p>Period</p> Signup and view all the answers

    What do you call the number of vibrations that occur in a 1-second time interval?

    <p>Frequency</p> Signup and view all the answers

    The particle model of light explains how light can travel through empty space without a medium.

    <p>True</p> Signup and view all the answers

    The amount of energy in a photon of light is proportional to the frequency of the corresponding light wave.

    <p>True</p> Signup and view all the answers

    Which type of electromagnetic waves has the highest frequency?

    <p>Gamma rays</p> Signup and view all the answers

    Which type of electromagnetic radiation is used to kill cancer cells?

    <p>Gamma rays</p> Signup and view all the answers

    The two most common models of light describe it as a wave or as a stream of what?

    <p>Particles</p> Signup and view all the answers

    In the particle model of light, individual 'packets' of light are called?

    <p>Photons</p> Signup and view all the answers

    In a vacuum, all light travels at a speed of ___ m/s.

    <p>3.0 x 10^8</p> Signup and view all the answers

    ___ is used for cooking as well as for communications.

    <p>Microwaves</p> Signup and view all the answers

    Study Notes

    Sound Waves

    • Sound waves require a medium to travel through.
    • They are classified as longitudinal waves, where particle vibrations are parallel to the direction of wave travel.

    Light Waves

    • Light waves are electromagnetic waves and do not require a medium to travel.
    • They are classified as transverse waves, where particle vibrations are perpendicular to the direction of wave travel.
    • The frequency of light determines its color, and higher frequencies correspond to higher energy and shorter wavelengths.

    Water Waves

    • Water waves transport energy without transporting the water itself.
    • They can exhibit characteristics of both transverses and longitudinal waves.

    Seismic Waves

    • Seismic waves travel through rocks and materials within the Earth.

    Wave Properties

    • A mechanical wave requires a medium, while electromagnetic waves do not.
    • The period of a wave is the time for one full wavelength to pass a point, and the frequency is the number of vibrations in one second.
    • Amplitude refers to the maximum distance particles move from their normal position, determining sound loudness and wave energy.

    Relationships between Wave Properties

    • Frequency (Hz) is the inverse of the period (seconds) – as period increases, frequency decreases.
    • A wave's speed is the product of its frequency and wavelength. For instance, a wave moving at 30 m/s with a frequency of 10 Hz has a wavelength of 3 m.

    Electromagnetic Spectrum

    • Radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays are all types of electromagnetic waves; they differ in frequency and wavelength.
    • Gamma rays have the highest frequency in the electromagnetic spectrum and are used in cancer treatment.

    Mathematical Representation

    • Sine curves are effective models for representing transverse waves.

    Additional Concepts

    • The effect of amplitude on mechanical waves correlates with energy; greater amplitude indicates higher energy.
    • Photons are the packets of light in the particle model, and all light travels at about 3.0 x 10⁸ m/s in a vacuum.

    True or False Statements

    • A wave transports energy but not matter: True
    • Visible light waves require a medium to travel: False
    • Sound waves are longitudinal: True
    • The greater the frequency, the greater the wave speed in a uniform medium: True
    • The energy of a mechanical wave depends on amplitude: True
    • The color of visible light is determined by wavelength: True

    Unique Wave Characteristics

    • The highest point of a transverse wave is called the crest, while the lowest point is called the trough.
    • The wavelength can be calculated based on the period and frequency relationship.

    Application of Waves

    • Microwaves are utilized in cooking and communications due to their ability to transmit energy efficiently.

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    Description

    Test your knowledge of waves with these flashcards focusing on sound, light, and water waves. Each card provides questions about the characteristics and media of different types of waves. Perfect for studying key concepts in Physics Chapter 11.

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