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  2. Electromagnetic spectrum - Wikipedia

    en.wikipedia.org/wiki/Electromagnetic_spectrum

    A diagram of the electromagnetic spectrum, showing various properties across the range of frequencies and wavelengths. The electromagnetic spectrum is the full range of electromagnetic radiation, organized by frequency or wavelength. The spectrum is divided into separate bands, with different names for the electromagnetic waves within each band.

  3. Spectroradiometry for Earth and planetary remote sensing

    en.wikipedia.org/wiki/Spectroradiometry_for...

    A visualization of different wavelength intervals in the electromagnetic (light) spectrum. Each category of wavelength intervals enables the identification and characterization of substances through their unique spectral features, patterns, and signatures. Today, most geological applications with spectroradiometry are focused within the visible ...

  4. Hyperspectral imaging - Wikipedia

    en.wikipedia.org/wiki/Hyperspectral_imaging

    Each image represents a narrow wavelength range of the electromagnetic spectrum, also known as a spectral band. These "images" are combined to form a three-dimensional ( x , y , λ ) hyperspectral data cube for processing and analysis, where x and y represent two spatial dimensions of the scene, and λ represents the spectral dimension ...

  5. Spectroscopy - Wikipedia

    en.wikipedia.org/wiki/Spectroscopy

    Spectroscopy, primarily in the electromagnetic spectrum, is a fundamental exploratory tool in the fields of astronomy, chemistry, materials science, and physics, allowing the composition, physical structure and electronic structure of matter to be investigated at the atomic, molecular and macro scale, and over astronomical distances.

  6. Spectral line - Wikipedia

    en.wikipedia.org/wiki/Spectral_line

    The phrase "spectral lines", when not qualified, usually refers to lines having wavelengths in the visible band of the full electromagnetic spectrum. Many spectral lines occur at wavelengths outside this range. At shorter wavelengths, which correspond to higher energies, ultraviolet spectral lines include the Lyman series of hydrogen.

  7. Spectral signature - Wikipedia

    en.wikipedia.org/wiki/Spectral_signature

    The spectral signature of an object is a function of the incidental EM wavelength and material interaction with that section of the electromagnetic spectrum. The measurements can be made with various instruments, including a task specific spectrometer , although the most common method is separation of the red, green, blue and near infrared ...

  8. Spectral band - Wikipedia

    en.wikipedia.org/wiki/Spectral_band

    A spectrum with various bands. Spectral bands are regions of a given spectrum, having a specific range of wavelengths or frequencies. Most often, it refers to electromagnetic bands, regions of the electromagnetic spectrum. [1] More generally, spectral bands may also be means in the spectra of other types of signals, e.g., noise spectrum.

  9. Spectral imaging - Wikipedia

    en.wikipedia.org/wiki/Spectral_imaging

    Spectral imaging is imaging that uses multiple bands across the electromagnetic spectrum. [1] While an ordinary camera captures light across three wavelength bands in the visible spectrum, red, green, and blue (RGB), spectral imaging encompasses a wide variety of techniques that go beyond RGB.