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EFL Championship Play Off Winners
EFL most commonly refers to English as a foreign language. EFL may also refer to: Sports * Eastern Football League (Australia), an Australian rules football league * Eastern Football League (Scotland), a defunct Scottish football competition * Elite Football League of India, an American football league in India, Sri Lanka and Bangladesh * Empire Football League, a semi-pro American football league * English Football League, an English football competition * Enterprise Football League, a Taiwanese football league * European Football League, a league of clubs affiliated with the European Federation of American Football Science and technology * EFL (programming language) * 35 mm equivalent focal length * Effective focal length * Enlightenment Foundation Libraries, a set of graphical software libraries Other uses * Eagle Air (Tanzania), an airline * Etron Fou Leloublan, a French avant-progressive rock band * Kefalonia International Airport in Greece See also * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
English As A Foreign Language
English as a second or foreign language is the use of English by speakers with different native languages. Language education for people learning English may be known as English as a second language (ESL), English as a foreign language (EFL), English as an additional language (EAL), English as a New Language (ENL), or English for speakers of other languages (ESOL). The aspect in which ESL is taught is referred to as teaching English as a foreign language (TEFL), teaching English as a second language (TESL) or teaching English to speakers of other languages (TESOL). Technically, TEFL refers to English language teaching in a country where English is not the official language, TESL refers to teaching English to non-native English speakers in a native English-speaking country and TESOL covers both. In practice, however, each of these terms tends to be used more generically across the full field. TEFL is more widely used in the UK and TESL or TESOL in the US. The term "ESL" has ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Effective Focal Length
The focal length of an optical system is a measure of how strongly the system converges or diverges light; it is the inverse of the system's optical power. A positive focal length indicates that a system converges light, while a negative focal length indicates that the system diverges light. A system with a shorter focal length bends the rays more sharply, bringing them to a focus in a shorter distance or diverging them more quickly. For the special case of a thin lens in air, a positive focal length is the distance over which initially collimated (parallel) rays are brought to a focus, or alternatively a negative focal length indicates how far in front of the lens a point source must be located to form a collimated beam. For more general optical systems, the focal length has no intuitive meaning; it is simply the inverse of the system's optical power. In most photography and all telescopy, where the subject is essentially infinitely far away, longer focal length (lower opti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
