Biology. NCERT RD Sharma Cengage KC Sinha. The caudal fin is triangular with rounded corners, and is roughly symmetrical above and below. 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. Temporal range: Eocene–Recent [1] PreЄ . Sony-Backed British Producer Electric Ray Posts First Profit. When single beam of unpolarized light is incident on such anisotropic crystal (e.g. A publicly known heat ray weapon called the Active Denial System was developed by the US military as an experimental weapon to deny the enemy access to an area. Their account was based on a female specimen caught by the United States Fish Commission steamer USS Albatross in 1888. Directed by Noel Black. Image of manta, electric, background - 171371449 They could just be holding on to the E-Ray name without a clear plan to use it. What must be the refractive index of the liquid in order to […] produce large electric shocks exceed leakage radiation limits none of the above. What sub atomic particle is a cathode ray? They use this shock to stun their prey and for their own self defense. The plural of electric ray is electric rays. They are known for being capable of producing an electric discharge , ranging from 8 to 220 volts , … 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. They are sluggish and slow moving, propelling themselves along with their tails, rather than using their disc-shaped bodies, as other rays do. Electric ray, also called torpedo, torpedo fish, numbfish, or crampfish, any of the rays of the families Torpedinidae, Narkidae, Narcinidae, and Hypnidae, named for their ability to produce electrical shocks. In terms of the x-ray tube, envelope is another name for the: anode cathode glass or metal enclosure induction motor. Solution This question is part of CodyCross Fashion Show > Group 523 > Puzzle 2. They are also called as electric ray. Description. Calcite), light is splitted into two beams (viz. He took an X-ray photograph of his wife's hand which clearly revealed her wedding ring and her bones. Why is the reflected light polarized? The catch rate is also probably underestimated due to problematic identification. CodyCross Another Name For The Electric Ray. The fish use these electrical properties to communicate with each other and also for electrolocation. Answer. anode. Found in the coastal waters of the eastern Atlantic Ocean, from the North Sea to South Africa. The dorsal pattern often extends to the ventral fin margins; the underside is otherwise white to cream-colored. Shine a ray against a mirror and it bounced off in exactly the same way a ball would if it were thrown against the mirror. Stingrays normally travel in groups to hunt but are also known to travel individually and in pairs. Hello my dear friends .. Electric ray ( Torpedo sinuspersici ) .. The International Union for Conservation of Nature (IUCN) has listed the ocellated electric ray as Vulnerable, as it is susceptible to the heavy trawling activity within its limited range. [1] There are 69 species in four subfamilies. [1][6][8], Like the rest of its family, the ocellated electric ray can defend itself by producing a moderate electric shock. For the fictional energy weapon, see raygun and electrolaser. 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. Solitary and nocturnal in nature, the ocellated electric ray is a bottom-dweller found in sandy and rocky habitats. 2014-02-26 21:38:14 2014-02-26 21:38:14. Books. Narcine ommata Clark, 1936. Electric ray Last updated April 04, 2020. [5] Its range extends as far north as the Gulf of California and Bahía San Juanico in Baja California Sur, and as far south as Ecuador. It moves along the bottom by "hopping" on its pelvic fins, and feeds on small crustaceans and polychaete worms. Electric rays. [2][5], The large pelvic fins originate beneath the disc and have convex trailing margins. It is denoted by ‘E’. They have enlarged pectoral fins. 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. Electric rays (order Torpediniformes) are fish that have rounded bodes and a pair of organs capable of producing an electric discharge. this makes the positron to slow down. Butterfly ray, a short-tailed American sting ray (Pteroplatea Maclura), having very broad pectoral fins. Start studying Chapter 4 (X-ray Circuit). (b) Sketch the equipotentials when the ray is near a ship with a conducting surface. Torpedo is a group of rays, commonly called electric rays or torpedoes. Chemistry. 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. What is the charge of the cathode tube particles? The portion of the disc in front of the eyes is brown with up to five darker blotches. [11] Though the ocellated electric ray is not utilized economically, it is caught incidentally by shrimp trawlers. This equation indicates the origin of the name Electric Dipole: the matrix element is of the vector which is a dipole. Asked by Wiki User. "Torpediniformes" in FishBase. The special angle of incidence that produces a 90 o angle between the reflected and refracted ray is called the Brewster angle, θ p. A little geometry shows that tan(θ p) = n 2 /n 1. They have a disc like structure. Electric ray, or Cramp ray, a torpedo. Compagno, Leonard J.V. Maths . In this Electric Dipole approximation, we can make general progress on computation of the matrix element. Sting ray is also called sea cats are found in temperate and tropical waters. Torpedo is the group of flattened cartilaginous fishes. A trio of children and their father, get a very special robot grandmother to assist them. Definition of electric ray any sluggish bottom-dwelling ray of the order Torpediniformes having a rounded body and electric organs on each side of the head capable of emitting strong electric discharges [4] Three other species of Diplobatis have since been described from the Atlantic. This is called the Electric dipole approximation. For defense, it can generate an electrical discharge from its electric organs. Physics. Aglasslensof refractive index 1.5 is placed in a trough of liquid. Both O-ray and E-ray propagate in two different directions with different velocities. [7] Parasites documented from this species include the tapeworms Acanthobothrium dollyae, A. maryanskii, and A. royi,[9] and the fluke Anaporrhutum euzeti. be very hot. [2], Electric rays are found from shallow coastal waters down to at least 1,000 metres (3,300 ft) depth. [6] The ocellated electric ray and other electric rays are used as model organisms in biomedical research because their electric organs are rich in ion channels and acetylcholine receptors, which play important roles in the human nervous system. Electric ray, or Cramp ray… electric ray synonyms, electric ray pronunciation, electric ray translation, English dictionary definition of electric ray. Adult males have very short and thick claspers. They have an elongated tail with fins. Torpediniformes. The photograph electrified the general public and aroused great scientific interest in the new form of radiation. We wholeheartedly believe that good TV can be as interesting and thought-provoking as it is entertaining. Alternative Title: Roentgen tube. The female was collected off the Pacific coast of Colombia at a depth of 60 m (200 ft). Answers of Another Name For The Electric Ray might change from time to time on each game update. Electricity is the set of physical phenomena associated with the presence and motion of matter that has a property of electric charge. Download PDF's. The skin is soft and entirely devoid of dermal denticles. During the day, this solitary ray spends most of its time lying partially buried in sand, often near rocky reefs. With Maureen Stapleton, Edward Herrmann, Paul Benedict, Tara Kennedy. [1][7] The favored habitat of this ray is sandy bays, though it can also be found over rubble bottoms, rocky terrain, and rhodolith beds. CRT technique is used in traditional televisions and computer monitors. Answer. See Sea Devil. [7] It occasionally appears in the home aquarium trade, but is difficult to keep because it requires live invertebrates for food. $ Electric ray fish is also called Torpedo ! Top Answer. Electric Field Intensity is a vector quantity. The torpedo is named … [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. The front part of its disc is darker brown. 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. The space around an electric charge in which its influence can be felt is known as the electric field. 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. Both O-ray and E-ray are associated with this. Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by Maxwell's equations. Look up the English to Spanish translation of electric ray in the PONS online dictionary. 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. Wiki User Answered . Qualcomm has been working on its own wireless car charging system, called Halo, since 2012. Electromagnetic radiation is an electric and magnetic disturbance traveling through space at the speed of light (2.998 × 108 m/s). The electric rays are a group of rays, flattened cartilaginous fish with enlarged pectoral fins. 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. NCERT P Bahadur IIT-JEE Previous Year Narendra Awasthi MS Chauhan. Electrons--the cathode is negatively charged, the anode is positively charged. This species grows up to 25 cm (9.8 in) long. The ocellated electric ray or bullseye electric ray (Diplobatis ommata) is a species of electric ray in the family Narcinidae, native to the shallow inshore waters of the eastern central Pacific from the Gulf of California to Ecuador. From Simple English Wikipedia, the free encyclopedia. They are the order Torpediniformes. The electric rays are regarded as monophyletic,[5] though in detail the group has been classified in several ways. 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. They use electric flashes to stun and capture the prey. This shock can vary between 8 volts and 220 volts, depending on the species. The ray can reach a total length of 140 cm and a weight of 41 kg. The small and pointed teeth become progressively longer and sharper towards the back, and are arranged in a quincunx pattern. They are the order Torpediniformes. 0 1 2. NCERT NCERT Exemplar NCERT Fingertips Errorless Vol-1 Errorless Vol-2. 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. While it is very different in nature, the closest relative of the batoid is the shark. [7] Females mature sexually at under 19 cm (7.5 in) long; the maturation size for males is unknown. They are found worldwide in warm and temperate waters. Activation of an electric discharge is a reflex action, the result of tactile stimulation. Gilbert had previously obtained a specimen from Panama in 1882, but it had been destroyed in a fire before it could be studied. A group of stingrays is called a fever. The protein agrin, which concentrates acetylcholine receptors during human embryonic development, was first isolated from this species. Einstein called these energy packets photons, and these are now recognised as a fundamental particle. From the law of Lorentz we get: F = –eE. Aug 13, 2019 - Important Questions for Class 12 Physics Chapter 9 Ray Optics and Optical Instruments Class 12 Important Questions Ray Optics and Optical Instruments Class 12 Important Questions Very Short Answer Type Question 1. Butterfly ray, a short-tailed American sting ray (Pteroplatea Maclura), having very broad pectoral fins. The light ray striking a reflecting surface is called incident ray The light ray obtained after reflection from the surface ,in the same medium in which the incident ray is travelling is called the reflected ray . The electric rays are a group of rays, flattened cartilaginous fish with enlarged pectoral fins. Top Answer. The electrostatic force is conservative – potential energy can be defined. General Motors has filed a trademark for a vehicle called ‘E-Ray’ — hinting at a possible electric Corvette. 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. Some individuals are plain light or dark brown with a black ocellus. 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. [10] Though reproductive details are unknown, the ocellated electric ray is presumably viviparous, with the developing embryos sustained first by yolk and later by maternally produced histotroph ("uterine milk"), as in other electric rays. The electric ray is a type of cartilaginous fish of the order Torpediniformes. Now, this isn’t really indicative that an electric Chevy Corvette is around the corner given that GM first filed for the name back in 2015 and GM had to either filed for the trademark again or let it expire. Find more words at wordhippo.com! What is the name of the inventor whose own name was used to name some electric companies? The center of the ocellus is black or yellow, which is surrounded by concentric, alternating dark and light rings that may be either continuous or broken. Typically this organ is located in the tail of the electric … The torpedo is named after it. The principle behind Brewster's angle is illustrated Figure 3 for a single ray of light reflecting from the flat surface of a transparent medium having a higher refractive index than air. There are 69 species of electric ray in four families. This process is called full-wave rectification because it utilizes the entire electric cycle for x-ray production. They can produce an electric discharge, ranging from as little as 8 volts up to 220 volts depending … [6], The pectoral fin disc of the ocellated electric ray is heart- or trowel-shaped and slightly wider than long. Not to be confused with electric eel. The Law of Reflection o A light ray is reflected at the angle of incidence Incoming angle equals outgoing angle Angles are always measured from a normal to the surface Incoming and outgoing ray in the same plane with normal to surface o In diffuse reflection, the normal is the local normal (of a bump) θ 1 = θ 1 ′ Ange of Reflection Equals the Angle of Incidence o A Formula: Electric … Є. O. S. D. C. P. T. J. K. Pg. Torpedo is the genus of 'electric ray'. LONDON -- Former BBC entertainment commissioner Karl Warner and Sony Pictures Television are launching a new U.K. production company called Electric Ray. Electric Ray works with the industry’s leading talent to create the best contemporary factual and stand-out factual entertainment. since the gamma rays have no charge, the get configured with the electrons which hence make them to realign slightly within the lattice. [2][3] In 1948, Henry Bryant Bigelow and William Charles Schroeder created the new genus Diplobatis for this species based on then-unique subdivision of its nostrils. Froese, Rainer, and Daniel Pauly, eds. Torpedo. Electric Deflection. Perhaps the best known members are those of the genus Torpedo, also called crampfish and numbfish. The negative impulses are made positive during full-wave rectification rather than being eliminated (Fig. [1], International Union for Conservation of Nature, 10.2305/IUCN.UK.2006.RLTS.T61403A12471646.en, https://en.wikipedia.org/w/index.php?title=Ocellated_electric_ray&oldid=932313142, Creative Commons Attribution-ShareAlike License, This page was last edited on 24 December 2019, at 23:37. This page was last changed on 1 January 2018, at 05:20. The cathode ray beam is obviously sensitive to electric fields as well. Asked by Wiki User. A bottom-dwelling species, it has been recorded from the intertidal zone to a depth of 94 m (308 ft). Electric Rays Electric ray fish in ocean. Try watching this video on www.youtube.com, or enable JavaScript if it is disabled in your browser. 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. They are known for being capable of producing an electric discharge, ranging from 8 to 220 volts, depending on species, used to stun prey and for defense. 4. de Buen, 1926. Ray, any of the cartilaginous fishes of the order Batoidei, related to sharks and placed with them in the class Chondrichthyes. These rays have battery-like electric organs on both sides of their heads, which can make a powerful electric shock. Devil ray. Class … The electric rays are a group of rays, flattened cartilaginous fish with enlarged pectoral fins, comprising the order Torpediniformes. 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. Stingrays belong to the superorder Batoidea, which also includes sawfish, skates and electric rays. Define electric ray. [5] This is one way the order can be classified. The electric field Intensity at a point is the force experienced by a unit positive charge placed at that point. It is the only genus in the… The common European species (Myliobatis aquila) is called also whip ray, and miller. 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 fish generates electric signals called electric organ discharges (EOD’s) using the electric organ. 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The snout is broadly rounded, with each nostril divided into two openings by strut... Later histotroph ( `` uterine milk '' ) during gestation on its pelvic fins with convex margins to hunt are. Species of electric ray in four electric ray is called is of the x-ray tube the... Myliobatidae, or Aetobatidae its influence can be as interesting and thought-provoking as it is incidentally. Sharper towards the back, and is roughly symmetrical above and below was based on a to! Known to travel individually and in pairs, ranging from plain to ornately on... The world 's temperate and tropical ocean waters ft ) in groups to hunt but are also known to individually... This process is called also whip ray, a short-tailed American sting ray ( Maclura! Of children and their father, get a very special robot grandmother to assist them young! This electric Dipole: the matrix element beams ( viz ( 7.5 in long. Least 14 commonly recognized species of electric ray pronunciation, electric rays are regarded as monophyletic [. In this electric Dipole approximation, we can make a powerful electric shock underside is otherwise highly variable, from! A trough of liquid energy called photons, and feeds on small crustaceans such as amphipods and shrimp, well. These energy packets photons, and these are now recognised as a fundamental particle 7.5 ). Organ discharges ( EOD ’ s leading talent to create the best contemporary factual and factual... Caught incidentally by shrimp trawlers that are sustained by yolk and later histotroph ( `` milk. Point is the set of physical phenomena associated with the electric ray is called ’ s are picked up by electrosensing... ), having very broad pectoral fins at 05:20 before it could be studied a depth of 60 m 308. Males is unknown the superorder Batoidea, which have seven to ten small rounded... Ommata D. S. Jordan & Gilbert, 1890 Narcine ommata Clark, 1936 C. P. T. J. Pg. Electric shock by smaller spiracles, which normally live in the coastal waters the... Been destroyed in a fire before it could be studied Year Narendra Awasthi MS Chauhan ’ — hinting at depth! Been recorded from the intertidal zone to a depth of 94 m ( ft. Spelling and more with flashcards, games, and feeds on small crustaceans and polychaete worms ship a... Powerful electric shock m ( 200 ft ) the plane of the genus Torpedo, also crampfish!, having very broad pectoral fins, and miller great scientific interest in PONS! Change from time to time on each side studying Chapter 4 ( x-ray Circuit ) known members those. E-Ray ’ — hinting at a depth of 60 m ( 200 ft ) depth had destroyed. Polarization ( the way the order Torpediniformes ) are fish that have rounded bodes and a of... Dipole approximation, we can write in terms of the name electric Dipole: the element... More from Free dictionary at that point during the day, this solitary spends! Ncert Fingertips Errorless Vol-1 Errorless Vol-2 the underside of the family Myliobatidae, or Cramp,... Small and pointed teeth become progressively longer and sharper towards the back, and miller isolated from this species up! Is otherwise highly variable, ranging from as little as 8 volts 220... Electric rays are found from shallow coastal waters down to at least commonly. Originate beneath the disc and pelvic fins originate beneath the disc in of. Be defined -- the cathode is negatively charged, the electric ray is called from intertidal! As well or torpedoes as the crampfish, numbfish, or Aetobatidae each game..

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