A lens with a focal length of 100mm and a diameter of 25mm would have an aperture of f/4.Ī device which reduces the amount of energy reaching a sensor. The f/# is the ratio of the focal length of the lens to its diameter. The aperture of a lens is often expressed in terms of an f/#. Angular aperture is the angle through which the most divergent rays can pass through a hole or lens. To make valid measurements, the contribution from the ambient light or background must be subtracted from each measurement.Ī hole through which radiant energy can pass. This light contributes to the signal measured from the source. See the Optical Radiation Hazard applications page for a listing of ILT light measurement systems used to determine the actinic hazard of a light source.Īmbient light is the light diffused in the environment surrounding a detector measuring the optical radiation from another source.
The color or optical density of the strip changes with the exposure.
Actinic strips are used in UV processing to monitor the intensity of sources. In our industry the term is usually used with reference to UV radiation and its effects on biological systems. The characteristic of radiation that indicates its capability to produce chemical change. If the %transmission of a certain wavelength is 70% then the material has a 30% Absorptance. Absorptance can also be inferred from the transmission through a medium. The standard unit of absorptance is percent (%) or a factor between 0 an 1. The ratio of the total absorbed radiant or luminous flux to the incident flux is called absorptance. The absorption is the "missing piece", when comparing the total reflected and transmitted energy with the incident energy. The dissipation of light (radiation) within a surface or medium, caused by the conversion of radiant (luminous) energy to a different form of energy, usually heat, by interaction with matter. They can be used by lovers, family, friends, and sometimes even strangers in a playful context 😉 English – “baby”.A B C D E F G H I J K L M N O P Q R S T U V W X Y Z nena / neneĮxpressing tenderness towards a woman (nena) or a man (nene). This term has also a second meaning which means “how bad!”. How is it going?, ❺sere, que bola? ¡candela!Ĭandela in Spanish means “candle”, but it’s not about electricity issues and looking for ones 😛 Here, just this girl is sooo sexy, or this party sooo insane, performance soo incredible that you just cannot handle it. Nowadays, it is a frequent greeting among Cubans meaning simply colleague / buddy / compatriot. It takes its name from the greetings of the members of the secret Abakuá association, which meant “I greet you!”. As Mark Anthony sings: “Y se formó la gozadera, (…)”, which means more or less “And the party has started” 🙂 asere Often used in the context of the started event or a very energetic piece that reached an ultimate moment. Literally means – “it formed itself, is created”. In timba songs we usually here the phrase “¡Dale mambo!”, which usually precedes the entry of the brass section. ¡dale!Įncouragement to act so in English “Let’s go” / “Do it”. Usually called after a great dance, song, party. It’s about reaching something best, ultimate that you don’t have to look for anywhere else.
“That’s it! / there is nothing I need more”. That’s water 🙂 They are not asking about a glass of one though 😉 You will call ¡agua! at the party when someone will burn the dance floor! ahí na’ ma’ In short – most of this lines are about great party or hot women 😉 But let’s look at some of them now. What is going on with this ‘candela’? Why they are singing about candles? In many of those Spanish will not help, due to the fact that it’s specific cuban slang. In timba or reggaeton music that we dance to at the parties, even not very sophisticated ear will pick up some often repeated phrases.
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