![]() Huygens in particular had a well developed theory from which he was able to derive the laws of reflection and refraction. A debate arose over whether light had a wave nature or a particle nature with René Descartes, Robert Hooke and Christiaan Huygens favouring a wave description and Newton favouring a particle description. Starting in 1666, Newton showed that these colours were intrinsic to light and could be recombined into white light. Isaac Newton was the first to use the term spectrum for the range of colours that white light could be split into with a prism. Light was intensively studied from the beginning of the 17th century leading to the invention of important instruments like the telescope and microscope. The ancient Greeks recognized that light traveled in straight lines and studied some of its properties, including reflection and refraction. Humans have always been aware of visible light and radiant heat but for most of history it was not known that these phenomena were connected or were representatives of a more extensive principle. See also: History of electromagnetism, History of radio, History of electrical engineering, and History of optics Spectroscopy is used to study the interactions of electromagnetic waves with matter. Throughout most of the electromagnetic spectrum, spectroscopy can be used to separate waves of different frequencies, producing a spectrum of the constituent frequencies. Radiation of visible light and longer wavelengths are classified as nonionizing radiation because they have insufficient energy to cause these effects. ![]() Exposure to ionizing radiation can be a health hazard, causing radiation sickness, DNA damage and cancer. Extreme ultraviolet, soft X-rays, hard X-rays and gamma rays are classified as ionizing radiation because their photons have enough energy to ionize atoms, causing chemical reactions. There is no known limit for long wavelengths, while it is thought that the short wavelength limit is in the vicinity of the Planck length. The electromagnetic waves in each of these bands have different characteristics, such as how they are produced, how they interact with matter, and their practical applications. This frequency range is divided into separate bands, and the electromagnetic waves within each frequency band are called by different names beginning at the low frequency (long wavelength) end of the spectrum these are: radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays at the high-frequency (short wavelength) end. The electromagnetic spectrum covers electromagnetic waves with frequencies ranging from below one hertz to above 10 25 hertz, corresponding to wavelengths from thousands of kilometers down to a fraction of the size of an atomic nucleus. The electromagnetic spectrum is the range of frequencies (the spectrum) of electromagnetic radiation and their respective wavelengths and photon energies. Since then, next-generation Air Max shoes have become a hit with athletes and collectors by offering striking color combinations and reliable, lightweight cushioning.Entire range of frequencies of electromagnetic radiation Class In 1987, the Air Max 1 debuted with visible Air technology in its heel, allowing fans more than just the feel of Air cushioning-suddenly they could see it. Revolutionary Air technology first made its way into Nike footwear in 1978. A rubber wafle outsole provides traction. The padded tongue, synthetic suede Swoosh and rubber heel patch all highlight the look in Radiant Red, while underfoot, the midsole houses visible Air in the heel for cushioning. The uppers are predominantly coated with stark black across its mesh layers and leather mudguards, and are balanced out by mid-foot/forefoot overlays doused with a metallic silver finish. Fresh colors give a modern look while Max Air cushioning adds comfort to your journey. The Nike Air Max 90 stays true to its OG roots with the iconic Waffle outsole, stitched overlays and classic TPU accents.
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