Input: Read this: Luminous efficacy of a light source may be defined in two ways. The radiant luminous efficacy (LER) is the ratio of the visible light flux emitted (the luminous flux) to the total power radiated over all wavelengths. The source luminous efficacy (LES) is the ratio of the visible light flux emitted (the luminous flux) to the total power input to the source, such as a lamp. Visible light is measured in lumens, a unit which is defined in part by the differing sensitivity of the human eye to different wavelengths of light. Not all wavelengths of visible electromagnetic energy are equally effective at stimulating the human eye; the luminous efficacy of radiant energy (LER) is a measure of how well the distribution of energy matches the perception of the eye. The units of luminous efficacy are "lumens per watt" (lpw). The maximum LER possible is 683 lm/W for monochromatic green light at 555 nanometers wavelength, the peak sensitivity of the human eye.
Question: In how many ways can one define luminous efficacy of a light source?

Output: two ways


QUES: In 2005, the Office of Fair Trading found fifty independent schools, including Eton, to have breached the Competition Act by "regularly and systematically" exchanging information about planned increases in school fees, which was collated and distributed among the schools by the bursar at Sevenoaks School. Following the investigation by the OFT, each school was required to pay around £70,000, totalling around £3.5 million, significantly less than the maximum possible fine. In addition, the schools together agreed to contribute another £3m to a new charitable educational fund. The incident raised concerns over whether the charitable status of independent schools such as Eton should be reconsidered, and perhaps revoked. However, Jean Scott, the head of the Independent Schools Council, said that independent schools had always been exempt from anti-cartel rules applied to business, were following a long-established procedure in sharing the information with each other, and that they were unaware of the change to the law (on which they had not been consulted). She wrote to John Vickers, the OFT director-general, saying, "They are not a group of businessmen meeting behind closed doors to fix the price of their products to the disadvantage of the consumer. They are schools that have quite openly continued to follow a long-established practice because they were unaware that the law had changed."

How much does Eaton give to the Independent Schools Council each year?
What is the answer?
ANS: unanswerable


QUES: The first Archivist, R.D.W. Connor, began serving in 1934, when the National Archives was established by Congress. As a result of a first Hoover Commission recommendation, in 1949 the National Archives was placed within the newly formed General Services Administration (GSA). The Archivist served as a subordinate official to the GSA Administrator until the National Archives and Records Administration became an independent agency on April 1, 1985.
Was Hoover one of many Archivists or was he the first?

ANS: unanswerable


As early as the late 18th century, black Baptists began to organize separate churches, associations and mission agencies, especially in the northern states. Not only did blacks set up some independent congregations in the South before the American Civil War, freedmen quickly separated from white congregations and associations after the war. They wanted to be free of white supervision. In 1866 the Consolidated American Baptist Convention, formed from black Baptists of the South and West, helped southern associations set up black state conventions, which they did in Alabama, Arkansas, Virginia, North Carolina, and Kentucky. In 1880 black state conventions united in the national Foreign Mission Convention, to support black Baptist missionary work. Two other national black conventions were formed, and in 1895 they united as the National Baptist Convention. This organization later went through its own changes, spinning off other conventions. It is the largest black religious organization and the second largest Baptist organization in the world. Baptists are numerically most dominant in the Southeast. In 2007, the Pew Research Center's Religious Landscape Survey found that 45% of all African-Americans identify with Baptist denominations, with the vast majority of those being within the historically black tradition.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What states setup white conventions?
Ah, so.. unanswerable


Question: The KU men's basketball team has fielded a team every year since 1898. The Jayhawks are a perennial national contender currently coached by Bill Self. The team has won five national titles, including three NCAA tournament championships in 1952, 1988, and 2008. The basketball program is currently the second winningest program in college basketball history with an overall record of 2,070–806 through the 2011–12 season. The team plays at Allen Fieldhouse. Perhaps its best recognized player was Wilt Chamberlain, who played in the 1950s. Kansas has counted among its coaches Dr. James Naismith (the inventor of basketball and only coach in Kansas history to have a losing record), Basketball Hall of Fame inductee Phog Allen ("the Father of basketball coaching"), Basketball Hall of Fame inductee Roy Williams of the University of North Carolina at Chapel Hill, and Basketball Hall of Fame inductee and former NBA Champion Detroit Pistons coach Larry Brown. In addition, legendary University of Kentucky coach and Basketball Hall of Fame inductee Adolph Rupp played for KU's 1922 and 1923 Helms National Championship teams, and NCAA Hall of Fame inductee and University of North Carolina Coach Dean Smith played for KU's 1952 NCAA Championship team. Both Rupp and Smith played under Phog Allen. Allen also coached Hall of Fame coaches Dutch Lonborg and Ralph Miller. Allen founded the National Association of Basketball Coaches (NABC), which started what is now the NCAA Tournament. The Tournament began in 1939 under the NABC and the next year was handed off to the newly formed NCAA.
Try to answer this question if possible: In what year did the NABC hold its first and only women's basketball tournament?
Answer: unanswerable


Context and question: In the late 1980s, key breakthroughs in GaN epitaxial growth and p-type doping ushered in the modern era of GaN-based optoelectronic devices. Building upon this foundation, Dr. Moustakas at Boston University patented a method for producing high-brightness blue LEDs using a new two-step process. Two years later, in 1993, high-brightness blue LEDs were demonstrated again by Shuji Nakamura of Nichia Corporation using a gallium nitride growth process similar to Dr. Moustakas's. Both Dr. Moustakas and Mr. Nakamura were issued separate patents, which confused the issue of who was the original inventor (partly because although Dr. Moustakas invented his first, Dr. Nakamura filed first).[citation needed] This new development revolutionized LED lighting, making high-power blue light sources practical, leading to the development of technologies like BlueRay, as well as allowing the bright high resolution screens of modern tablets and phones.[citation needed]
What technology was made possible by high-power blue light sources?
Answer:
BlueRay