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- Visible light is a tiny portion of a huge smorgasboard of light called the electromagnetic spectrum. For our convenience, we break this smorgasboard up into different courses (appetizer, salad, etc.) and refer to them by name, such as gamma-rays, X-rays, ultraviolet, optical, infrared, and radio.
blair.pha.jhu.edu/spectroscopy/basics.html
Light is sometimes also known as visible light to contrast it from "ultraviolet light" and "infrared light". Other forms of electromagnetic radiation that are not visible to humans are sometimes also known informally as "light". Polychromatic light is described by many different frequencies.
Apr 10, 2022 · The electromagnetic spectrum consists of gamma rays, X-rays, ultraviolet radiation, visible light, infrared, and radio radiation. Many of these wavelengths cannot penetrate the layers of Earth’s atmosphere and must be observed from space, whereas others—such as visible light, FM radio and TV—can penetrate to Earth’s surface.
The electromagnetic spectrum consists of gamma rays, X-rays, ultraviolet radiation, visible light, infrared, and radio radiation. Many of these wavelengths cannot penetrate the layers of Earth’s atmosphere and must be observed from space, whereas others—such as visible light, FM radio and TV—can penetrate to Earth’s surface.
- OpenStax
- 2017
Jun 7, 2023 · From eyeglasses to microscopes, two laws of physics work light-bending magic. A prism causes incoming light to bend by different amounts, depending on the wavelength — or color — of that light. As light passes through the prism and exits on the other side, it spreads out into a rainbow.
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.
- Adapted by Jean Creighton
- 2019
Light rays that pass through an interface are transmitted rays. These rays bend. This bending is called refraction. The direction and magnitude of refraction depends on the relative densities of the two media and the angle of incidence. Refracted light rays behave in the following ways:
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Higher energy light photons, like X-rays, tend to want to plow through more matter before they get absorbed. (Hence, their use in medical imaging: they can pass through your "soft" tissue, but are more readily absorbed in your bones, which are denser.) How and why do photons get absorbed by matter?
