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Optics is the branch of physics which involves 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 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). Practical applications of optics are found in a variety of technologies and everyday objects, including mirrors, lenses, telescopes, microscopes, lasers, and fibre optics.
Long post, I know, but please read carefully so we don’t waste each other’s time. Please PM me with offers/questions to keep the thread clean. Lowballers and off-topic trade offers will likely not get a response.
Up for trade ideally but cash also an option, is everything you need to convert...
Optics neophyte here.
I'm starting to research small monoculars.
Use would be for target shooting (probably max is 100 yards) and outdoor activity (kayaking and hiking).
Because I know nothing, I would appreciate some suggestions of products to research.
Looking for the best quality...
Brand new in box EyeRide optical HUD with Bluetooth. Connects to Android and/or Apple phones. Really cool setup that can connect other riders to talk, phone calls, map navigation, and music.
Comes with optical HUD, controller, speakers, microphone, and all cables and 3M mounting pads as listed...
SIghtmark CoreTX 8.5-25x50MR scope
Awesome scope, better glass than the Vortex (at same price point)
Had this on an AR and took a couple trips to the range. No problems, excellent scope.... my only beef is that all my other scopes are in MILS and this is MOA.
Gets confusing at times.
It is not uncommon for ammunition, standard capacity magazines, and "scary" guns to become scarce during the now thoroughly routine panic cycles. I don't, however, recall optics becoming problematic.
This past week I was looking for a Leupold FX-II Ultralight 2.5x20㎜ to complete one of the...
I have a grey Austrian Styer Scout
Jeff cooper edition with fluted barrel
Chambered in 308 win
Extra magazine that attaches into the stock and also has a built in bipod. Cool unique rifle. if you know, you know. Burris variable optic, also rifle has a very... very low round count. I’ve...
(cross posting in accessories as well)
This is a replacement unit from Sig, factory zero'd at 25 yrds. New in the box and has not been mounted. The photo with the sight on a gun is a stock photo to help illustrate just how compact the sight is.
Including all accessories as pictured, and the...
BRAND NEW w/o box ( made right here in Portland !!! )
The CMR-206 Rail Master® is a compact, yet powerful, UNIVERSAL green laser sight designed to fit "ANYTHING" rail-equipped. The laser sight fits onto any Picatinny or Weaver-style accessory rail be it a pistol, AR, Rifle, AR-Pistol platform...
QUALITY makes these compact Binocs work like units twice as large... Over $800 new and worth it. Great Xmas gift.
The CL Pocket 8x25 in black are foldable compact binoculars of exceptional optical quality. They offer optimum viewing comfort, even during long observation periods, and are easy...
Used it but in good shape and works like a German optic. Nice simple unit. point and shoot. Paid 599 a few years back.
Out to 1200 yards. QUALITY device.
Scanning mode continuously updates yardage readings
Phase-coated roof prism with P40 coating
4-Digit LED display easily read in all...
Laser RangefindersScout DX 1000 ARCDescription:Easy arithmetic: one button, four hooves in the air- 6x magnification- E.S.P. (Extreme. Speed. Precision.) Provides up to 1/2 yard accuracy and 1/10th yard display precision- Built in inclinometer provides ARC- Compatible with magnetic...
Looking to trade a once mounted m1-b ultimak upper, and also a only inserted 9396 polytech 75rnd Chinese drum. Drum only has storage wear as with the ultimak. Looking for a rs regulate 301-303 with micro dot upper and cheap micro dot(primary arms etc) plus cash. Or straight trade all for a mro...
For sale is a completly custom Gen 4 Glock 19. Parts are as follows: Nomad 9 serialized Glock 19 frame, with factory stippled grip and thumbrests, with 3 separate backstraps for both size and more standard 1911 grip angle. Brownells Gen4 Glock 19 slide with RMR optics cutout. Glock Gen 5 Glock...