They lie in wait for prey below the sand or other substrate, using their electricity to stun and capture it.[1][3][4]. Electric ray, or Cramp ray… They feed on invertebrates and small fish. Reaching 25 cm (9.8 in) in length, this species has a rounded pectoral fin disc and pelvic fins with convex margins. The negative impulses are made positive during full-wave rectification rather than being eliminated (Fig. Asked by Wiki User. Electric ray definition: any ray of the order Torpediniformes, of tropical and temperate seas, having a flat... | Meaning, pronunciation, translations and examples The ocellated electric ray is named for the distinctive large eyespot on the middle of its disc, consisting of a black or yellow center surrounded by concentric rings. See Sea Devil. See more. It turns out after the Pacific Electric Ray shocks its prey, they have to recharge, so I received the brunt of the electric charge, while Thor was able to snuggle up next to it without so much as a buzz, because it didn’t have anything left to give. They have an elongated tail with fins. This will be combined with a 6.2-litre V8 delivering 490 hp, which is the same as the one that powers the current Corvette model. 5 6 7. Chemistry. Description. Butterfly ray, a short-tailed American sting ray (Pteroplatea Maclura), having very broad pectoral fins. They are known for being capable of producing an electric discharge , ranging from 8 to 220 volts , … They are the order Torpediniformes. Books. Calcite), light is splitted into two beams (viz. $ Electric ray fish is also called Torpedo ! Alternative Title: Roentgen tube. glass of metal enclosure. They are found worldwide in warm and temperate waters. Formula: Electric … (c) How could this charge distribution be of use to the ray? The electrical discharge varies from 8 to 220 volts and is passed between the electrically negative ventral side of the ray to the positive dorsal side. Gilbert had previously obtained a specimen from Panama in 1882, but it had been destroyed in a fire before it could be studied. General Motors has filed a trademark for a vehicle called ‘E-Ray’ — hinting at a possible electric Corvette. Visible light is carried by photons, and … From the law of Lorentz we get: F = –eE. The name comes from the Latin torpere, to be stiffened or paralyzed, referring to the effect on someone who handles or steps on a living electric ray. American ichthyologists David Starr Jordan and Charles Henry Gilbert described the ocellated electric ray in an 1890 article for the scientific journal Proceedings of the United States National Museum. Ray, any of the cartilaginous fishes of the order Batoidei, related to sharks and placed with them in the class Chondrichthyes. Einstein called these energy packets photons, and these are now recognised as a fundamental particle. Download PDF's. They are sluggish and slow moving, propelling themselves along with their tails, rather than using their disc-shaped bodies, as other rays do. Electromagnetic radiation is an electric and magnetic disturbance traveling through space at the speed of light (2.998 × 108 m/s). He took an X-ray photograph of his wife's hand which clearly revealed her wedding ring and her bones. For defense, it can generate an electrical discharge from its electric organs. Includes free vocabulary trainer, verb tables and pronunciation function. What must be the refractive index of the liquid in order to […] NCERT DC Pandey Sunil Batra HC Verma Pradeep Errorless. When single beam of unpolarized light is incident on such anisotropic crystal (e.g. Cathode ray tube, CRT is the heart of CRO which produces images when electron beam from the back of the tube strikes the fluorescent screen with sufficient energy. They have a disc like structure. There are two small dorsal fins, both with rounded to angular apices; the first is slightly smaller than the second, and its position varies from over to behind the pelvic fins. Define electric ray. The snout is broadly rounded, with each nostril divided into two openings by a strut. They can produce an electric discharge, ranging from as little as 8 volts up to 220 volts depending on species. The common European species (Myliobatis aquila) is called also whip ray, and miller. Electric Rays Electric ray fish in ocean. this makes the positron to slow down. The movement produces oscillating electric and magnetic fields, which travel at right angles to each other in a bundle of light energy called a photon. There are 69 species in four families. CodyCross Another Name For The Electric Ray. Roentgen called it "X" to indicate it was an unknown type of radiation. Some individuals are plain light or dark brown with a black ocellus. Biology. The common European species (Myliobatis aquila) is called also whip ray, and miller. The dorsal pattern often extends to the ventral fin margins; the underside is otherwise white to cream-colored. A trio of children and their father, get a very special robot grandmother to assist them. During the day, this solitary ray spends most of its time lying partially buried in sand, often near rocky reefs. Electric rays. The EOD’s are picked up by the electrosensing receptors present on the body of the fish. Froese, Rainer, and Daniel Pauly, eds. NCERT NCERT Exemplar NCERT Fingertips Errorless Vol-1 Errorless Vol-2. Electrons--the cathode is negatively charged, the anode is positively charged. electric ray any of an order (Torpediniformes) of cartilaginous fishes with special organs that can produce strong electrical discharges used to paralyze or stun its enemies or prey Webster's New World College Dictionary, Fifth Edition Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. X-ray tube, also called Roentgen tube, evacuated electron tube that produces X rays by accelerating electrons to a high velocity with a high-voltage field and causing them to collide with a target, the anode plate. Jordan and Gilbert named the new species ommata (Greek for "eyed") in reference to the distinctive spot on its back, and assigned it to the genus Discopyge. 2009. Solitary and nocturnal in nature, the ocellated electric ray is a bottom-dweller found in sandy and rocky habitats. The electrostatic force is conservative – potential energy can be defined. Top Answer. They have enlarged pectoral fins. Perhaps the best known members are those of the genus Torpedo, also called crampfish and numbfish. The remainder of the upper surface is most commonly a shade of light brown with numerous fine dark dots; there may also be light dots, larger dark spots or blotches, and/or irregular brown marbling. Devil ray. Its mortality from fishing has not been quantified but is thought to be high, considering that trawling operations in the Atlantic are known to take Diplobatis species in large numbers. These rays have battery-like electric organs on both sides of their heads, which can make a powerful electric shock. de Buen, 1926. We’re proud of our reputation for first class ideas and for making television that gets talked about and noticed for all the right reasons. The torpedo is named … Its dorsal coloration is otherwise highly variable, ranging from plain to ornately patterned on a light to dark brown background. It becomes more active at night, using its pelvic fins to "hop" along the sea floor. electric_ray synonyms, pronunciation, spelling and more from Free Dictionary. The space around an electric charge in which its influence can be felt is known as the electric field. therefore the kinetic energy of the gamma ray = (138 keV-126keV) = 12keV b) when the gamma ray and the electric field interacts, some energy is lost in terms of heat and a force that cause the motion. Discopyge ommata D. S. Jordan & Gilbert, 1890 The word torpedo comes from a genus of electric rays in the sub-family Torpedininae, namely Torpedo, which in turn comes from the Latin "torpere" (to be stiff or numb). Devil ray. [7] Females mature sexually at under 19 cm (7.5 in) long; the maturation size for males is unknown. They are known for being capable of producing an electric discharge, ranging from as little as 8 volts up to 220 volts depending on species, used to stun prey and for defense. The incident ray is drawn with only two electric vector vibration planes, but is intended to represent light having vibrations in all planes perpendicular to the direction of propagation. The direction of polarization (the way the electric field vectors point)is parallel to the plane of the interface. This process is called full-wave rectification because it utilizes the entire electric cycle for x-ray production. Meaning of electric_ray. Top Answer. Typically this organ is located in the tail of the electric … Wiki User Answered . Dinosaurs are also called Thunder-Lizards. Narcine ommata Clark, 1936. The thick electric organs are usually discernible on each side. With Maureen Stapleton, Edward Herrmann, Paul Benedict, Tara Kennedy. It feeds on small crustaceans such as amphipods and shrimp, as well as polychaete worms. Jul 16, 2014 - Marbled Electric Ray - Torpedo marmorata (not to be confused with Torpedo sinuspersici, also called Marbled electric ray) - The electric shock delivered by a Marbled electric ray can be severe, but is not directly life-threatening. The heat ray is an application of EMR that makes use of microwave frequencies to create an unpleasant heating effect in the upper layer of the skin. The pulsed x-ray output of a full-wave rectified machine occurs 120 times each second compared to 60 times a second for half-wave rectification. An x-ray tube functions as a specific energy converter, receiving electrical energy and converting it into two other forms of energy: x-radiation (1%) and heat (99%). Hello my dear friends .. Electric ray ( Torpedo sinuspersici ) .. What sub atomic particle is a cathode ray? Rays are distinguished from sharks by a flattened, disklike body, with the five gill openings and the mouth generally located on the underside. Electric ray, or Cramp ray… Their account was based on a female specimen caught by the United States Fish Commission steamer USS Albatross in 1888. [5] This is one way the order can be classified. The electric rays are a group of rays, flattened cartilaginous fish with enlarged pectoral fins. They use this shock to stun their prey and for their own self defense. The electric rays are a group of rays, flattened cartilaginous fish with enlarged pectoral fins, composing the order Torpediniformes /tɔːrˈpɛdɪnɪfɔːrmiːz/. A pair of large, kidney-shaped electric organs are visible through the skin on either side of the head. Asked by Wiki User. There are 69 species of electric ray in four families. Maths . The common European species (Myliobatis aquila) is called also whip ray, and miller. According to GM Authority, the Corvette E-Ray will be equipped with an 85-kW electric motor, offering the equivalent of 115 hp, which will be powered by four batteries placed under the centre of the body. Butterfly ray, a short-tailed American sting ray (Pteroplatea Maclura), having very broad pectoral fins. The electric rays are regarded as monophyletic,[5] though in detail the group has been classified in several ways. NCERT P Bahadur IIT-JEE Previous Year Narendra Awasthi MS Chauhan. They are also called as electric ray. [11] Though the ocellated electric ray is not utilized economically, it is caught incidentally by shrimp trawlers. The front part of its disc is darker brown. It moves along the bottom by "hopping" on its pelvic fins, and feeds on small crustaceans and polychaete worms. NCERT RD Sharma Cengage KC Sinha. [3][5], The dorsal coloration of the ocellated electric ray is extremely variable, with the only constant being the large ocellus ("eyespot") in the middle of the back. [1], The shock from the ocellated electric ray is not dangerous to humans. [4] Three other species of Diplobatis have since been described from the Atlantic. The force is proportional to the intensity of the electric field, and is directed in the opposite direction since the charge of the electron is negative, as shown in the picture below. From Simple English Wikipedia, the free encyclopedia. The protein agrin, which concentrates acetylcholine receptors during human embryonic development, was first isolated from this species. The small mouth forms a transverse line; the edge of the lower jaw is scalloped, and when closed usually conceals the teeth. Look up the English to Spanish translation of electric ray in the PONS online dictionary. They are the order Torpediniformes. [1][6][8], Like the rest of its family, the ocellated electric ray can defend itself by producing a moderate electric shock. Storage of Electric Energy; Cathode Ray Tube: TV and Computer Monitors, Oscilloscope; The Electrocardiogram (ECG or EKG) 17.1 Electrostatic Potential Energy and Potential Difference. 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