Literary nonsense from a combination of both sources. Though not the first to write this hybrid kind of nonsense, Edward Lear developed and popularized it in his many limericks (starting with "A Book of Nonsense", 1846) and other famous texts such as "The Owl and the Pussycat", "The Dong with a Luminous Nose," "" and "The Story of the Four Little Children Who Went Around the World". Lewis Carroll continued this trend, making literary nonsense a worldwide phenomenon with "Alice's Adventures in Wonderland" (1865) and "Through the Looking-Glass" (1871). Carroll's poem "Jabberwocky", which appears in the latter book, is often considered quintessential
Luminous efficacy spectral response curve (the luminosity function). When expressed in dimensionless form (for example, as a fraction of the maximum possible luminous efficacy), this value may be called "luminous efficiency of a source", "overall luminous efficiency" or "lighting efficiency". The main difference between the luminous efficacy of radiation and the luminous efficacy of a source is that the latter accounts for input energy that is lost as heat or otherwise exits the source as something other than electromagnetic radiation. Luminous efficacy of radiation is a property of the radiation emitted by a source. Luminous efficacy of a source is a property