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.
Alcoholic spirits measure
Alcoholic spirits measures are instruments designed to measure exact amounts or shots of alcoholic spirits.
The most common products used today to measure spirits are the thimble measure and the non-drip measure, often referred to as an optic. The terms Optic, Optic Pearl, OpticJade and OpticOpal are all trademarks of Gaskell & Chambers owned by the company IMI Cornelius (UK) Ltd, but the word “optic” has become synonymous with inverted or non-drip spirit measures.
The optic or non-drip measure is mounted beneath an inverted spirit bottle, whereby the alcohol dispenses into the measure and is discharged when a lever on the measure is pushed up. This mechanism ensures that a correct spirit measure can be dispensed each time, as the inverted bottle allows the measure to be replenished in the optic after each shot has been dispensed. Bottles are available to the trade with their labels upside down so that they will be the right way up when mounted on the optic.
The thimble measure is a stainless steel vessel, like a shot glass, predominantly used as a measurement with free flow pourers.
Optic (disambiguation)
An optic (not to be confused with optics, the science of light) is something that changes the behavior or properties of light.
Optic may also refer to:
OPTIC can refer to :
Podcasts:
