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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/
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.
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.
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.
Energy types on the electromagnetic spectrum are denoted by wavelength. Infrared wavelengths are longer than those of visible light, while ultraviolet wavelengths are shorter. Ultraviolet radiation has shorter wavelengths than visible light, comprising the 100-400 nm part of the spectrum.
Visible light, as called the visible spectrum, is the portion of the electromagnetic spectrum that is visible to (can be detected by) the human eye. Electromagnetic radiation in this range of wavelengths is often simply referred to as “light”.
Electromagnetic radiation with wavelengths between roughly 400 and 700 nm is called visible light because these are the waves that human vision can perceive. This is also the band of the electromagnetic spectrum that most readily reaches Earth’s surface.
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Oct 24, 2024 · Similarly, going from the ν values of visible light to the very much larger ones of gamma rays represents another increase in frequency by a factor of a million billion. This extremely large range of ν values , called the electromagnetic spectrum, is shown in Figure 1 , together with the common names used for its various parts, or regions.
