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Naga Fireball
Naga fireballs ( th, บั้งไฟพญานาค; ), also known as ''bung fai phaya nak'' or "Mekong lights" and, formerly, "ghost lights" are a phenomenon said to be seen annually on the Mekong River. Glowing balls are alleged to naturally rise from the water high into the air. The balls are said to be reddish and to range in size from smaller sparkles up to the size of basketballs. They quickly rise up to a couple of hundred metres before disappearing. The number of fireballs reported varies between tens and thousands per night. The phenomenon is locally attributed to '' phaya nak'', a giant serpent (Nāga) said to live in the Mekong. Description The fireballs are most often reported around the night of Wan Ok Phansa at the end of Buddhist Lent in late-October. Naga fireballs have been reported over an approximately long section of the Mekong River centered approximately on Phon Phisai in the Phon Phisai District. Fireballs have also been reported rising from smalle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flare Gun
A flare gun, also known as a Very pistol or signal pistol, is a large-bore handgun that discharges flares, blanks and smoke. The flare gun is typically used to produce a distress signal. Types The most common type of flare gun is a Very (sometimes spelled Verey), which was named after Edward Wilson Very (1847–1910), an American naval officer who developed and popularized a single-shot breech-loading snub-nosed pistol that fired flares (Very lights). They have a single action trigger mechanism, hammer action, and a center fire pin. Modern varieties are frequently made out of durable plastic of a bright colour that makes them more conspicuous and easier to retrieve in an emergency and assists in distinguishing them from conventional firearms. The Very pistol, typical of the type used in the Second World War, are of one inch bore (26.5mm), now known as "Calibre 4" for signal pistols. These are still available and more recent longer barrel models can also fire parachute flares ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unsolved Problems In Physics
The following is a list of notable unsolved problems grouped into broad areas of physics. Some of the major unsolved problems in physics are theoretical, meaning that existing theories seem incapable of explaining a certain observed phenomenon or experimental result. The others are experimental, meaning that there is a difficulty in creating an experiment to test a proposed theory or investigate a phenomenon in greater detail. There are still some questions beyond the Standard Model of physics, such as the strong CP problem, neutrino mass, matter–antimatter asymmetry, and the nature of dark matter and dark energy. Another problem lies within the mathematical framework of the Standard Model itself—the Standard Model is inconsistent with that of general relativity, to the point that one or both theories break down under certain conditions (for example within known spacetime singularities like the Big Bang and the centres of black holes beyond the event horizon). Genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atmospheric Ghost Lights
Atmospheric ghost lights are lights (or fires) that appear in the atmosphere without an obvious cause. Examples include the onibi, hitodama and will-o'-wisp. They are often seen in humid climates. Tsunoda 1979, pages 11-53 According to legend, some lights are wandering spirits of the dead, the work of devils (or yōkai), or the pranks of fairies. They are feared by some people as a portent of death. In other parts of the world, there are folk beliefs that supernatural fires appear where treasure is buried; these fires are said to be the spirits of the treasure or the spirits of humans buried with grave goods. Atmospheric ghost lights are also sometimes thought to be related to UFOs.Kanda 1992, pages 275-278. Some ghost lights such as St. Elmo's fire or the shiranui have been explained as optical phenomena of light emitted through electrical activity. Other types may be due to combustion of flammable gases, ball lightning, meteors, torches and other human-made fires, the mispercepti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isan
Northeast Thailand or Isan (Isan/ th, อีสาน, ; lo, ອີສານ; also written as Isaan, Isarn, Issarn, Issan, Esan, or Esarn; from Pali ''īsānna'' or Sanskrit ईशान्य ''īśānya'' "northeast") consists of 20 provinces in the northeastern region of Thailand. Isan is Thailand's largest region, located on the Khorat Plateau, bordered by the Mekong River (along the Laos–Thailand border) to the north and east, by Cambodia to the southeast and the Sankamphaeng Range south of Nakhon Ratchasima. To the west it is separated from northern and central Thailand by the Phetchabun Mountains. Isan covers making it about half the size of Germany and roughly the size of England and Wales. The total forest area is or 15 percent of Isan's area. Since the beginning of the 20th century, northeastern Thailand has been generally known as ''Isan'', while in official contexts the term ''phak tawan-ok-chiang-nuea'' (; 'northeastern region') may be used. The majority p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chir Batti
Chir Batti, Chhir Batti or Cheer batti is a ghost light reported in the Banni grasslands, a seasonal marshy wetlands near the India–Pakistan border in Kutch district, Gujarat, India. Local villagers refer to the light as Chir Batti in the Kutchhi-Sindhi language, with Chir meaning ghost and Batti meaning light. It is described as an unexplained light occurring on dark nights as bright as a mercury lamp that changes its colour to blue, red and yellow and resembles a moving ball (reported also pear shaped form) of fire, which may move as fast as an arrow but may also stop. As per local folklore, these lights have been a part of life in the Banni grasslands and the adjoining Rann of Kutch for centuries, but are little known beyond the immediate area and people continue to call them "ghost lights". Witnesses claim the lights at times appear to be playing hide and seek or following them. Some reports claim the light can only be seen after 8 pm on dark nights, are always two to ten f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microwave Oven
A microwave oven (commonly referred to as a microwave) is an electric oven that heats and cooks food by exposing it to electromagnetic radiation in the microwave frequency range. This induces polar molecules in the food to rotate and produce thermal energy in a process known as dielectric heating. Microwave ovens heat foods quickly and efficiently because excitation is fairly uniform in the outer of a homogeneous, high-water-content food item. The development of the cavity magnetron in the UK made possible the production of electromagnetic waves of a small enough wavelength (microwaves). American engineer Percy Spencer is generally credited with inventing the modern microwave oven after World War II from radar technology developed during the war. Named the "Radarange", it was first sold in 1946. Raytheon later licensed its patents for a home-use microwave oven that was introduced by Tappan in 1955, but it was still too large and expensive for general home use. Sharp Corpo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microwave
Microwave is a form of electromagnetic radiation with wavelengths ranging from about one meter to one millimeter corresponding to frequencies between 300 MHz and 300 GHz respectively. Different sources define different frequency ranges as microwaves; the above broad definition includes both UHF and EHF (millimeter wave) bands. A more common definition in radio-frequency engineering is the range between 1 and 100 GHz (wavelengths between 0.3 m and 3 mm). In all cases, microwaves include the entire SHF band (3 to 30 GHz, or 10 to 1 cm) at minimum. Frequencies in the microwave range are often referred to by their IEEE radar band designations: S, C, X, Ku, K, or Ka band, or by similar NATO or EU designations. The prefix ' in ''microwave'' is not meant to suggest a wavelength in the micrometer range. Rather, it indicates that microwaves are "small" (having shorter wavelengths), compared to the radio waves used prior to microwave te ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ball Lightning
Ball lightning is a rare and unexplained phenomenon described as luminescent, spherical objects that vary from pea-sized to several meters in diameter. Though usually associated with thunderstorms, the observed phenomenon is reported to last considerably longer than the split-second flash of a lightning bolt, and is a phenomenon distinct from St. Elmo's fire. Some 19th-century reports describe balls that eventually explode and leave behind an odor of sulfur. Descriptions of ball lightning appear in a variety of accounts over the centuries and have received attention from scientists. An optical spectrum of what appears to have been a ball lightning event was published in January 2014 and included a video at high frame rate. Laboratory experiments have produced effects that are visually similar to reports of ball lightning, but how these relate to the supposed phenomenon remains unclear. Scientists have proposed a number of hypotheses to explain reports of ball lightning over ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plasma Physics
Plasma ()πλάσμα , Henry George Liddell, Robert Scott, ''A Greek English Lexicon'', on Perseus is one of the . It contains a significant portion of charged particles – s and/or s. The presence of these charged particles is what primarily sets plasma apart from the other fundamental states of matter. It is the most abundant form of |
Phosphine
Phosphine (IUPAC name: phosphane) is a colorless, flammable, highly toxic compound with the chemical formula , classed as a pnictogen hydride. Pure phosphine is odorless, but technical grade samples have a highly unpleasant odor like rotting fish, due to the presence of substituted phosphine and diphosphane (). With traces of present, is spontaneously flammable in air ( pyrophoric), burning with a luminous flame. Phosphine is a highly toxic respiratory poison, and is immediately dangerous to life or health at 50 ppm. Phosphine has a trigonal pyramidal structure. Phosphines are compounds that include and the organophosphines, which are derived from by substituting one or more hydrogen atoms with organic groups. They have the general formula . Phosphanes are saturated phosphorus hydrides of the form , such as triphosphane. Phosphine, PH3, is the smallest of the phosphines and the smallest of the phosphanes. History Philippe Gengembre (1764–1838), a student of Lavois ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brian Dunning (skeptic)
Brian Andrew Dunning (born 1965) is an American writer and producer who focuses on science and skepticism. He has hosted a weekly podcast, ''Skeptoid'', since 2006, and he is an author of a series of books on the subject of scientific skepticism, some of which are based on the podcast. ''Skeptoid'' has been the recipient of several podcast awards such as the Parsec Award. Dunning has also created the ''Skeptoid.org'' spin-off video series, ''inFact'', and ''The Feeding Tube'' both available on YouTube. Dunning has produced two educational films on the subject of critical thinking: ''Here Be Dragons'' in 2008, and ''Principles of Curiosity'' in 2017. Dunning co-founded Buylink, a business-to-business service provider, in 1996, and served at the company until 2002. He later became eBay's second biggest affiliate marketer; he has since been convicted of wire fraud through a cookie stuffing scheme. In August 2014, he was sentenced to 15 months in prison, followed by three years of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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