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The Bluebird Library has been celebrating the lives of famous scientists. Each month, a new scientist is selected and displays are created to feature the discoveries and contribution of the scientist. April’s scientist of the month is Thomas Young; the library wishes to develop a Young’s experient display. The library has purchased a blue laser which emits light with a wavelength of 473 nm. They also have purchased a slide with a double slit; the slit spacing is 44 µm. The library’s current plans are to project the interference pattern onto a white board which is 3 feet wide and located 28 feet from the slits. What is the maximum number of bright spots which will appear on the board at these distances and what is the spacing distance between each bright spot? Assume that each bright spot is bright enough to see. (GIVEN: 1 m = 3.28 ft, 1 m = 106 mm, 1 m = 109 nm) Lastly, you can do your part by learning more about light pollution and by taking steps to reduce extra nighttime lighting in your own town and backyard. In addition to letting you see the stars better, these steps may also save you money on electricity and help reduce the world’s energy usage. Cities and towns that routinely put up ever-brighter lights for no reason other than “that’s what we’ve always done” may think twice about spending the money if they hear just a few voices of opposition. Several different types of light sources exist, each having different properties that affect their appropriateness for certain tasks, particularly efficiency and spectral power distribution. It is often the case that inappropriate light sources have been selected for a task, either due to ignorance or because more sophisticated light sources were unavailable at the time of installation. Therefore, badly chosen light sources often contribute unnecessarily to light pollution and energy waste. By re-assessing and changing the light sources used, it is often possible to reduce energy use and pollutive effects while simultaneously greatly improving efficiency and visibility. A Harvard study shed a little bit of light on the possible connection to diabetes and possibly obesity. The researchers put 10 people on a schedule that gradually shifted the timing of their circadian rhythms. Their blood sugar levels increased, throwing them into a prediabetic state, and levels of leptin, a hormone that leaves people feeling full after a meal, went down. Light clutter refers to excessive groupings of lights. Groupings of lights may generate confusion, distract from obstacles (including those that they may be intended to illuminate), and potentially cause accidents. Clutter is particularly noticeable on roads where the street lights are badly designed, or where brightly lit advertising surrounds the roadways. Depending on the motives of the person or organization that installed the lights, their placement and design can even be intended to distract drivers, and can contribute to accidents. In establishing an acceptable level of polluting, some clarification of qualitative values will strengthen future decisions. Consider the research by Gallaway (2014 Gallaway, T. (2014). The value of the night sky. In J. Meier, U. Hasenöhrl, K. Krause, & M. Pottharst (Eds.), Urban lighting, light pollution and society (pp. 267–283). New York, NY: Taylor & Francis. [Google Scholar]), who explores the instrumental value of the night sky for promoting the broadly held values of happiness and sustainability. He concludes by stating, ‘We suggest that estimating the night’s value is not nearly as important as simply recognizing that it does have enormous value and then trying to preserve this value and put it to good use’ (p. 280). Gallaway’s discussion of key night sky traits includes its ability to connect us to the natural world, its ability to engender a sense of wonder, and its beauty. Such an articulation of the value of reducing light pollution falls outside traditional economic calculations, as discussed elsewhere by Gallaway (2010 Gallaway, T. (2010). On light pollution, passive pleasures, and the instrumental value of beauty. Journal of Economic Issues, 44, 71–88.10.2753/JEI0021-3624440104[Taylor & Francis Online], [Web of Science ®] [Google Scholar]). It also further calls into question a needs-based approach. As a frame, light pollution will set the boundaries on what sort of answers are possible, which requires a careful consideration of how ‘needs’ are defined, and what needs ought to be encapsulated by future policies. Use this form to report a problem with a street light or a lit bollard. To report a street light outage, a light going on and off (cycling), a light on during the day, vandalism, or any other problem with a street light, call the Street Light Outage Hotline or use the online form. The street lights on motorways and trunk roads are looked after by the Highways Agency, so any faults should be reported using their helpline (0300 123 5000). The purpose of this paper is to elucidate light pollution as a normative concept, and focus specifically on its increasing role in shaping, or framing, future regulatory efforts, and decision-making processes. The goal is not to condemn or approve of the use of light pollution from an ethical perspective, nor is it to arrive at definitive answers for the ambiguities inherent in the concept. Rather, I begin by accepting the term as the dominant concept for describing a novel environmental problem, and critically reflect on its ethical significance and potential limitations. While the implications of light pollution are far-reaching, here I will focus specifically on light pollution as it relates to urban nighttime lighting. Such an analysis can be seen as an example of an issue discussed within this journal by Elliott (2009 Elliott, K. (2009). The ethical significance of language in the environmental sciences: Case studies from pollution research. Ethics, Place & Environment, 12, 157–173.10.1080/13668790902863382[Taylor & Francis Online] [Google Scholar]), namely the ethical significance of language and terminology choices for framing environmental policy decisions and debates. While Elliott discusses very different types of pollution, the themes highlighted are quite relevant for an examination of light pollution. Elliott—who draws from a more pragmatic branch of environmental ethics that I adopt here—describes the usefulness of practical ethics for policy discussions. Philosophers can help to create and define the moral space within which policy decisions will be made, and so can contribute to upstream policy decisions. Elliot (2009 Elliott, K. (2009). The ethical significance of language in the environmental sciences: Case studies from pollution research. Ethics, Place & Environment, 12, 157–173.10.1080/13668790902863382[Taylor & Francis Online] [Google Scholar], p. 170) explains that, Many warning lights indicate that a fault has occurred inside the vehicle’s system, but it doesn’t pinpoint the item or system that has failed. In these cases, a code reader or scan tool can help determine the part that needs to be replaced. If an indicator light on your dash is on, visit your local AutoZone store to get the best products and information to help keep your vehicle running in top condition. The GravityLight Foundation aims to improve the lives of people without electricity by providing clean, safe and affordable lighting Only lights maintained by Transport for Bucks show on this map. Lights that do not show will either be maintained by the local parish or district, or if on a new road or estate, may not have been adopted by the Council. If the light bulb does not light up at all, follow this troubleshooting procedure: About 1.7 billion people or more than a fifth of the world’s population are without access to electricity and modern lighting. The problem is most severe in rural areas or on the fringes of cities. , however the extent to rural electrification varies widely from country to country.  For example, 90% of Africa is not served by grid electricity versus 20% of Mexico. In fact, some African countries, for example, Rwanda and Burundi have barely passed the 1% electrification threshold! Please note that the following street lights are not handled by The City. vigrx Testogen Steroïden TestX Core Maxman Eron Plus power up premium erogan VigRX Plus VigRX Plus

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