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optics
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.
*** SOLD ***
I believe I picked this up awhile back in a trade deal?
Leupold Gloss, M8, 6x42. This scope has the super fine "Cross Hair" reticle. I don't know if these scopes were sold with the 1/4 moa target turrets/knobs installed or if someone sent it in and had them installed. Either way...
$400 (Now $300!)
-Glock Gen 4 small frame (trigger guard has been modified, Dawson Precision grip tape)
-S&J Customs (SJC) MicroMount installed on the frame, including thumb rest (DPPro not included for free)
Included with frame: takedown lever/spring, locking block/pin, slide stop, trigger...
Has anyone had experience with the H&K 770 rifles? They are a .308 / 7.62㎜ sporting rifle produced back in the day. I'm not up on all things H&K, but the traditional styling, the chambering, and the 4 and 10-round magazines are interesting. The one I'm looking at on an auction site has some...
$700.00
trades considered: + or - cash
.45 cal 1911’s
S&W Shield .45
Glock 30s
Glock 19 ( gen 3/4 )
Glock 27 ( gen 3/4 )
S&W M&P 9mm Shield / compact M&P’s
M&P15 SPORT II Optics Ready
Unfired M&P15 SPORT II Optics Ready Rifle. Bought new at NW Armory 9/2017. Unfired. As New condition...
Can anyone give a honest review on cabelas scopes? I am looking at getting one of the rimfire scopes for my 10/22 td.
For half off it seems like a good gamble unless they are pure garbage. Plus, I was wondering if anyone knew what the parallax is set at?
Cabela's Caliber-Specific Rimfire...
New Never Fired DPMS Oracle AR10 Rifle .308 firepower. I added the Vortex Viper PST 1-4x24 optics with Aero Precision mount , All new Magpul furniture & 4 total magazines, other upgrades include charging handle extension, safety selector, mag.release . It’s ready to hunt or turn heads at...
Selling my Benelli R1 300WSM Argo semi auto rifle 24" with attached Nikon Monarch 4-15x50SF M BDC Scope. This has been my primary hunting rifle for the past 5 years. Has been flawless! It packs the punch of a 300 WSM with the recoil of a much smaller caliber. If you are recoil shy and want a...
***SOLD***
Used once but then sold scope and bought a 34mm scope. No use for a 30mm mount anymore.
Excellent condition. Solid mount for AR 15 platform. Extended for additional eye relief.
Paid $90
Asking $50.
***SOLD***
Scope is in mint condition but I no longer have the box.
Clear glass, has parallax adjustment and comes with 1 Piece Weaver Tactical SPR mount. For more info: <broken link removed>
$130
Also selling a Nikon P223 3-9x40 with Aero Precision mount here:WTS OR - Nikon P223 3-9x40...
Thoughts on thermal/night vision optics on a rifle? All ideas/concerns/opinions/pros/cons/brands&models/types/etc welcomed, including fun and interesting ideas to try out. No specific area of preconceived philosophies of use for how used...except obviously for game animals and/or looking into...
We are a Vortex dealer and are currently selling more Vortex products than local big box stores. Give us a call and let us SAVE you money this hunting season. Several options in stock or can be in your hands in about a week.
Live out of the area, no problem, even with shipping we can save you...
SOLD
For sell or trade is a Bushnell AR Optics Rifle Scope 4.5-18x 40mm. Reticle is .308 BDC. The scope mount is a Burris P.E.P.R. 1" QD mount. Asking $200 with the scope mount or $140 without the mount. No dings or scratches and like new. This was on a rifle for 60 rounds. I have original...