Locution and Etymologically Related Terms About Speech

Locution and Etymologically Related Terms About Speech Locution and Etymologically Related Terms About Speech Locution and Etymologically Related Terms About Speech By Mark Nichol Locution, meaning â€Å"style of speech† (in the sense of the art of speaking), stems from the Latin word loqui, meaning â€Å"to speak.† Here are the other words in English based on the Latin term, and their meanings. A colloquy (literally, â€Å"speaking together†) is a conversation or a conference; the related term colloquium refers to a formal meeting consisting of one or more addresses by experts followed by a question-and-answer session. Interestingly, the adjective form colloquial has the antonymic senses of â€Å"informal† and â€Å"conversational.† Words with the same root form include soliloquy (literally, â€Å"speaking alone†), the word for a monologue in a play in which a character shares his or her thoughts, as well as obloquy, which can mean â€Å"harsh criticism† or can refer to the condition of being criticized or discredited. Meanwhile, ventriloquy, a variation of ventriloquism (literally, â€Å"speaking from the stomach†), denotes the practice of deceiving an audience for entertainment by speaking in such a way that the audience believes the voice is coming from another source, usually a puppet manipulated by the ventriloquist to appear to be talking. (A more obscure meaning is â€Å"expressing oneself through another,† especially as a writer does by having a fictional character represent his or her attitudes or beliefs.) Grandiloquence (literally, â€Å"large speaking†) is a familiar term for a bombastic or pompous form of speaking, but a less well-known synonym is magniloquence (literally, â€Å"great speaking†), and vaniloquence (literally, â€Å"vain speaking†), which refers to foolish talk, is related in both formation and meaning. Somniloquence (literally, â€Å"sleep talking†), however, is a neutral word meaning â€Å"talking in one’s sleep.† The difference between the meanings of eloquence and loquacity is a distinction between quality and quantity; an eloquent speaker is an effective one, but a loquacious one is merely talkative. Interlocutor might be perceived as meaning â€Å"one who interrupts,† but it simply (and neutrally) refers to a fellow participant in a conversation (interlocution literally means â€Å"speaking between†). However, circumlocution (which literally means â€Å"speaking around†) connotes a judgment: a circumlocutory person speaks evasively or verbosely. Want to improve your English in five minutes a day? Get a subscription and start receiving our writing tips and exercises daily! Keep learning! Browse the Vocabulary category, check our popular posts, or choose a related post below:100 Idioms About Numbers10 Types of Transitionsâ€Å"Least,† â€Å"Less,† â€Å"More,† and â€Å"Most†

All About the Speed of Light and What It Measures

All About the Speed of Light and What It Measures Light moves through the universe at the fastest speed astronomers can measure. In fact, the speed of light is a cosmic speed limit, and nothing is known to move faster. How fast does light move? This limit can be measured and it also helps define our understanding of the universes size and age. What Is Light: Wave or Particle? Light travels fast, at a velocity of 299, 792, 458 meters per second. How can it do this? To understand that, its helpful to know what light actually is and thats largely a 20th-century discovery. The nature of light was a great mystery for centuries. Scientists had trouble grasping the concept of its wave and particle nature.  If it was a wave what did it propagate through? Why did it appear to travel at the same speed in all directions? And, what can the speed of light tell us about the cosmos?  It wasnt until Albert Einstein described this theory of special relativity in 1905 it all came into focus. Einstein argued that space and time were relative and that the speed of light was the constant that connected the two. What Is the Speed of Light? It is often stated that the speed of light is constant and that nothing can travel faster than the speed of light. This isnt entirely accurate. The value of 299,792,458 meters per second (186,282 miles per second) is the speed of light in a vacuum.  However, light actually slows down as it passes through different media. For instance, when it moves through glass, it slows down to about two-thirds of its speed in a vacuum.  Even in air, which is nearly a vacuum, light slows down slightly. As it moves through space, it encounters clouds of gas and dust, as well as gravitational fields, and those can change the speed a tiny bit. The clouds of gas and dust also absorb some of the light as it passes through. This phenomenon has to do with the nature of light, which is an electromagnetic wave. As it propagates through a material its electric and magnetic fields disturb the charged particles that it comes in contact with. These disturbances then cause the particles to radiate light at the same frequency, but with a phase shift. The sum of all these waves produced by the disturbances will lead to an electromagnetic wave with the same frequency as the original light, but with a shorter wavelength and, hence a slower speed. Interesting, as fast as light moves, its path can be bent as it passes by regions in space with intense gravitational fields. This is fairly easily seen in galaxy clusters, which contain a lot of matter (including dark matter), which warps the path of light from more distant objects, such as quasars. Gravitational lensing and how it works. Light from a distant object passes by a closer object with a strong gravitational pull. The light is bent and distorted and that creates images of the more distant object.   NASA Lightspeed and Gravitational Waves Current theories of physics predict that gravitational waves also travel at the speed of light, but this is still being confirmed as scientists study the phenomenon of gravitational waves from colliding black holes and neutron stars. Otherwise, there are no other objects that travel that fast. Theoretically, they can get close to the speed of light, but not faster. One exception to this may be space-time itself. It appears that distant galaxies are moving away from us faster than the speed of light. This is a problem that scientists are still trying to understand. However, one interesting consequence of this is that a travel system based on the idea of a warp drive. In such a technology, a spacecraft is at rest relative to space and its actually space that moves, like a surfer riding a wave on the ocean. Theoretically, this might allow for superluminal travel. Of course, there are other practical and technological limitations that stand in the way, but its an interesting science-fiction idea that is getting some scientific interest.   Travel Times for Light One of the questions that astronomers get from members of the public is: how long would it take light to go from object X to Object Y? Light gives them a very accurate way to measure the size of the universe by defining distances. Here are a few of the common ones distance measurements: The Earth to the Moon: 1.255 secondsThe Sun to Earth: 8.3 minutesOur Sun to the next closest star: 4.24 yearsAcross our Milky Way  galaxy: 100,000 yearsTo the closest  spiral galaxy (Andromeda): 2.5 million yearsLimit of the observable universe to Earth: 13.8 billion years Interestingly, there are objects that are beyond our ability to see simply because the universe IS expanding, and some are over the horizon beyond which we cannot see. They will never come into our view, no matter how fast their light travels. This is one of the fascinating effects of living in an expanding universe.   Edited by Carolyn Collins Petersen