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    • Electromagnetic spectrum

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      • The entire electromagnetic spectrum is much more than just visible light. It encompasses a range of wavelengths of energy that our human eyes can’t see.
      earthsky.org/space/what-is-the-electromagnetic-spectrum/
  1. Sep 30, 2022 · The Hubble Space Telescope can view objects in more than just visible light, including ultraviolet, visible and infrared light. These observations enable astronomers to determine certain physical characteristics of objects, such as their temperature, composition and velocity.

  2. Jul 18, 2024 · The electromagnetic waves your eyes detect – visible light – oscillate between 400 and 790 terahertz (THz). To put it another way, that’s several hundred trillion times a second.

  3. Visible light (and near-infrared light) is typically absorbed and emitted by electrons in molecules and atoms that move from one energy level to another. This action allows the chemical mechanisms that underlie human vision and plant photosynthesis.

  4. Infrared (IR) light is electromagnetic radiation with longer wavelengths than those of visible light, extending from the nominal red edge of the visible spectrum at 0.74 micrometers (µm) to 1 mm.

  5. Ultraviolet radiation has shorter wavelengths than visible light, comprising the 100-400 nm part of the spectrum. There are also other types of radiation that come from the Sun, such as X-rays, gamma rays, and radio waves, that are invisible to the human eye.

  6. Nov 14, 2014 · The electromagnetic (EM) spectrum is the range of all types of EM radiation. Radiation is energy that travels and spreads out as it goes – the visible light that comes from a lamp in your house and the radio waves that come from a radio station are two types of electromagnetic radiation.

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  8. Jul 29, 2023 · Electromagnetic radiation with wavelengths between 0.01 nanometer and 20 nanometers is referred to as X-rays. Being more energetic than visible light, X-rays are able to penetrate soft tissues but not bones, and so allow us to make images of the shadows of the bones inside us.

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