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Optics is the branch of physics that studies the behaviour and properties of light, including its interactions with matter and the construction of instruments that use or detect it. Optics usually describes the behaviour of visible, ultraviolet, and infrared light. Because light is an electromagnetic wave, other forms of electromagnetic radiation such as X-rays, microwaves, and radio waves exhibit similar properties.Most optical phenomena can be accounted for by using the classical electromagnetic description of light. Complete electromagnetic descriptions of light are, however, often difficult to apply in practice. Practical optics is usually done using simplified models. The most common of these, geometric optics, treats light as a collection of rays that travel in straight lines and bend when they pass through or reflect from surfaces. Physical optics is a more comprehensive model of light, which includes wave effects such as diffraction and interference that cannot be accounted for in geometric optics. Historically, the ray-based model of light was developed first, followed by the wave model of light. Progress in electromagnetic theory in the 19th century led to the discovery that light waves were in fact electromagnetic radiation.
Some phenomena depend on the fact that light has both wave-like and particle-like properties. Explanation of these effects requires quantum mechanics. When considering light's particle-like properties, the light is modelled as a collection of particles called "photons". Quantum optics deals with the application of quantum mechanics to optical systems.
Optical science is relevant to and studied in many related disciplines including astronomy, various engineering fields, photography, and medicine (particularly ophthalmology and optometry, in which it is called physiological optics). Practical applications of optics are found in a variety of technologies and everyday objects, including mirrors, lenses, telescopes, microscopes, lasers, and fibre optics.
Like new (less than 100 rounds) Smith & Wesson Sport II Optics Ready with new 15" M-LOK Handrail will send with original handrail.
Optic, BCM pistol grip, sling, and fore grip not included.
Will ship in original S&W Sport II Box.
Gently used, purchased from SGC, I have a Smith & Wesson package deal. S&W M&P 9mm C.O.R.E Pro Series. It has NOT had any work, tampered or customization done to it. It has original case and all accesories that were included. Included are 13 factory S&W hicap 17 rnd magazines. Burris Fastfire 3...
Wacky Wed Deal - 06/07/17 - Aimpoint - Patrol Rifle Optic (PRO) - $419.99
One Day Only Sale! Use Discount Code: WWD-00607
The Aimpoint® PRO sight comes in a ready-to-go kit at a budget friendly price, a concept that appeals strongly to Law Enforcement units.
Wacky Wed Deal - 06/07/17 -...