Light Frequency and Electromagnetic Spectrum
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Questions and Answers

What is the unit of frequency equal to one trillion Hertz?

  • Hz
  • THz (correct)
  • GHz
  • MHz

    • What determines the frequency of electromagnetic radiation?

  • Speed of light only
  • Wavelength only
  • Wavelength and speed of light (correct)
  • Frequency of the source

    • What is the frequency range of visible light?

  • 400 GHz to 700 GHz
  • 400 Hz to 700 Hz
  • 400 THz to 700 THz (correct)
  • 400 kHz to 700 kHz

    • What is the relationship between frequency and wavelength?

    <p>Frequency increases as wavelength decreases</p> Signup and view all the answers

    What is the equation that relates frequency and wavelength?

    <p>c = λf</p> Signup and view all the answers

    What did Homer describe the ocean as?

    <p>grey-gleaming and wine-dark</p> Signup and view all the answers

    What determines how strongly an eye sees a certain color?

    <p>The amount of photoreceptors present in the eye</p> Signup and view all the answers

    Which animal can see in the ultraviolet range?

    <p>Spiders and insects like bees</p> Signup and view all the answers

    What is certain about the color 592 THz?

    <p>Eyes detect light in the visible range, and 592 THz is a particular color</p> Signup and view all the answers

    What is unique about the mantis shrimp's eyes?

    <p>They can see millions of colors that humans do not</p> Signup and view all the answers

    What is the range of frequency of visible light in THz?

    <p>400-700 THz</p> Signup and view all the answers

    What happens when light shines on an object?

    <p>The object's atoms absorb the light as energy and release it soon after</p> Signup and view all the answers

    What is the color of light with the highest frequency?

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

    Why isn't everything white?

    <p>Because objects absorb and release light of different frequencies</p> Signup and view all the answers

    What can be used to separate white light into its constituent colors?

    <p>A prism</p> Signup and view all the answers

    What is the purpose of the electromagnetic spectrum?

    <p>To categorize em radiation by frequency</p> Signup and view all the answers

    What happens to the frequency of light as the wavelength decreases?

    <p>It increases</p> Signup and view all the answers

    What is a characteristic of all types of electromagnetic radiation?

    <p>They all have the same speed</p> Signup and view all the answers

    What is true about the human eye?

    <p>It can see some types of em radiation</p> Signup and view all the answers

    What is the purpose of the equation c = λf?

    <p>To relate frequency and wavelength</p> Signup and view all the answers

    What is the approximate range of frequency of yellow light?

    <p>510-530 THz</p> Signup and view all the answers

    What is the result when light shines on an object?

    <p>The light is absorbed, and the object's atoms vibrate before releasing it at a different frequency</p> Signup and view all the answers

    Why is white light not a single color in the visible spectrum?

    <p>Because it is a combination of all the colors in the visible spectrum</p> Signup and view all the answers

    What is the order of colors in the visible spectrum, from lowest frequency to highest?

    <p>Red, Orange, Yellow, Green, Blue, Indigo, Violet</p> Signup and view all the answers

    What happens to the light when it is absorbed by an object's atoms?

    <p>It is absorbed and then re-emitted at a different frequency</p> Signup and view all the answers

    What can influence how we interpret something like color?

    <p>Both personal experiences and cultural knowledge</p> Signup and view all the answers

    What do researchers do to understand how animals see color?

    <p>Examine their eyes to understand how they see</p> Signup and view all the answers

    Which animal can see more colors than humans?

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

    How do different people interpret the color 592 THz?

    <p>They may interpret it differently</p> Signup and view all the answers

    What is special about the eyes of spiders and insects like bees?

    <p>They can see in the ultraviolet range</p> Signup and view all the answers

    Study Notes

    Frequency of Light

    • Electromagnetic radiation travels through space as a wave, and different types of radiation vary by frequency.
    • The electromagnetic spectrum is ordered by frequency, with visible light ranging from 400 THz to 700 THz.

    Characteristics of Light

    • A hertz is defined as the number of oscillations or repeats of a cycle in one second.
    • Frequency is how many times a complete wave passes by a fixed point in one second.
    • All light travels at the same speed, regardless of frequency, so light with a longer wavelength has a smaller frequency and vice versa.

    Electromagnetic Spectrum

    • Radio:
    • Microwave:
    • Infrared:
    • Visible Light: 400 THz to 700 THz
    • Ultraviolet:
    • X-Ray:
    • Gamma Ray:

    Visible Light Frequency

    • Visible light occurs between 400 THz and 700 THz.
    • The frequency increases from red to violet, with a corresponding decrease in wavelength.
    • White light is a combination of all colors of the spectrum, not a specific frequency on the visible spectrum.

    Color Frequency

    • There are seven pure spectral colors in the light color spectrum, in order from lowest frequency to highest: red, orange, yellow, green, blue, indigo, and violet.
    • Color frequency ranges:
      • Red: 400-480 THz
      • Orange: 480-510 THz
      • Yellow: 510-530 THz
      • Green: 530-600 THz
      • Blue: 600-670 THz
      • Indigo: 670-700 THz
      • Violet: 700-750 THz

    The Nature of Color

    • The perception of color is influenced by personal experiences and cultural knowledge.
    • Different people may interpret the same color differently.
    • Non-human eyes can detect light in different frequencies, with some animals seeing fewer or more colors than humans.

    Frequency of Light

    • Electromagnetic radiation travels through space as a wave, and different types of radiation vary by frequency.
    • The electromagnetic spectrum is ordered by frequency, with visible light ranging from 400 THz to 700 THz.

    Characteristics of Light

    • A hertz is defined as the number of oscillations or repeats of a cycle in one second.
    • Frequency is how many times a complete wave passes by a fixed point in one second.
    • All light travels at the same speed, regardless of frequency, so light with a longer wavelength has a smaller frequency and vice versa.

    Electromagnetic Spectrum

    • Radio:
    • Microwave:
    • Infrared:
    • Visible Light: 400 THz to 700 THz
    • Ultraviolet:
    • X-Ray:
    • Gamma Ray:

    Visible Light Frequency

    • Visible light occurs between 400 THz and 700 THz.
    • The frequency increases from red to violet, with a corresponding decrease in wavelength.
    • White light is a combination of all colors of the spectrum, not a specific frequency on the visible spectrum.

    Color Frequency

    • There are seven pure spectral colors in the light color spectrum, in order from lowest frequency to highest: red, orange, yellow, green, blue, indigo, and violet.
    • Color frequency ranges:
      • Red: 400-480 THz
      • Orange: 480-510 THz
      • Yellow: 510-530 THz
      • Green: 530-600 THz
      • Blue: 600-670 THz
      • Indigo: 670-700 THz
      • Violet: 700-750 THz

    The Nature of Color

    • The perception of color is influenced by personal experiences and cultural knowledge.
    • Different people may interpret the same color differently.
    • Non-human eyes can detect light in different frequencies, with some animals seeing fewer or more colors than humans.

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    Description

    Learn about light as a form of electromagnetic radiation, its frequency, and the electromagnetic spectrum. Discover the frequency range of visible light and its unit of measurement.

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