Description : Who first theoretically predicted the existence of the positron, a positively charged electron? He received the Nobel Prize in Physics in 1933.
Last Answer : ANSWER: (PAUL ADRIEN MAURICE) DIRAC
Description : Positron was discovered by a) J. J. Thomson b) Millikan c) Anderson d) Dirac
Last Answer : d) Dirac
Description : The presence of anti-matter was predicted by a) P.A.M Dirac b) Anderson c) Einstein d) Chamberlain
Last Answer : a) P.A.M Dirac
Description : Pick out the wrong statement. (A) The nucleus of a hydrogen atom is identical with a proton (B) A, β-ray particle is identical with an electron (C) Mass of an electron is about 1/1800th of the lightest nucleus (D) Positron is heavier than a proton
Last Answer : (D) Positron is heavier than a proton
Description : The atomic number of a nucleus will increase by 1 if which of the following is emitted by the nucleus? w) an alpha particle x) a positron y) a beta particle z) a gamma ray
Last Answer : ANSWER: Y -- BETA PARTICLE
Description : The physicist Chadwick is known for his association with: w) the alpha particle x) the neutron y) the cloud chamber z) the electron
Last Answer : ANSWER: X -- THE NEUTRON
Description : All chiral D-sugars rotate plane-polarized light : (a) clockwise (b) counterclockwise (c) +20.0° (d) in a direction that cannot be predicted but must be determined experimentally
Last Answer : in a direction that cannot be predicted but must be determined experimentally
Description : Dr. Leon Lederman and two other physicists won the Nobel prize for discovering an elementary particle. That particle is the: w) positron x) meson y) muon z) neutrino
Last Answer : ANSWER: Z -- NEUTRINO
Description : The anti-particle to an electron is: w) proton x) positron y) neutron z) anti-proton
Last Answer : ANSWER: X -- POSITRON
Description : When an atomic nucleus emits a beta particle, one of its neutrons disintegrates into one of the following set of particles. Does it disintegrate into: w) a positron and an electron x) a proton, an ... and an antineutrino y) a proton, an electron, and a positron z) a neutrino and an antineutrino
Last Answer : ANSWER: X -- A PROTON, AN ELECTRON AND AN ANTINEUTRINO
Description : One of the following is a device that detects charged particles but does NOT show their tracks. Is this device the: w) spark chamber x) photographic plate y) scintillation counter z) bubble chamber
Last Answer : ANSWER: Y -- SCINTILLATION COUNTER
Description : Particle spray produced in Cloud chamber?
Last Answer : often the high speed particles are due to upper atmosphere collissions just as you suspected, muons are often created up there. A friend of mine did a basic cloud chamber experiment looking at ... much about them affecting your health though as they usually won't interact with anything. gwrnerally
Description : Ozone layer in the outer atmosphere helps us in – (1) reflecting radio waves and makes radio communication possible (2) regulating he temperature of atmosphere (3) absorbing cosmic ray particles (4) absorbing U-V radiations
Last Answer : (4) absorbing U-V radiations Explanation: The ozone layer is a layer in Earth's atmosphere containing relatively high concentrations of ozone (03) which absorbs 97- 99% of the Sun's medium-frequency ultraviolet light.
Description : Ozone layer in the outer atmosphere helps us in (1) reflecting radio waves and makes radio communication possible (2) regulating the temperature of atmosphere (3) absorbing cosmic ray particles (4) absorbing U-V radiations
Last Answer : absorbing U-V radiations
Description : Who firstly demonstrated experimentally the existence of electromagnetic wave? -General Knowledge
Last Answer : The answer is 'Hertz'
Last Answer : answer:
Description : Who firstly demonstrated experimentally the existence of electromagnetic wave?
Last Answer : Hertz
Description : 1. Sex determination of child is done by whose chromosome? 2. Who is authorised to decide over a dispute regarding disqualification of a member of Parliament? 3. Who firstly demonstrated ... of bargets, coasters and dredgers? 20. In which country was Buddhism first propogated outside India?
Last Answer : Answer : 1. Father 2. President 3. Hertz 4. Mahogany 5. Archaeological excavations 6. December 20 7. International Year of Volunteers 8. Increase growth in lenght 9. Tropical moist deciduous ... . Boxing 17. Herbert Spencer 18. During a Financial Emergency 19. Garden Reach Shipyard 20. Srilanka
Description : The particle required to continue the chain process of Uranium fission is – (1) Electron (2) Proton (3) Neutron (4) Positron
Last Answer : (3) Neutron Explanation: Fission as encountered in the modern world is usually a deliberately produced man-made nuclear reaction induced by a neutron. The nuclear fuels undergo fission when struck by fission ... rate in a nuclear reactor or at a very rapid uncontrolled rate in a nuclear weapon.
Description : Name the particle that is most essential to continue the chain reaction during the fission of uranium - (1) Electron (2) Proton (3) Neutron (4) Positron
Last Answer : (3) Neutron Explanation: Nuclear fission is either a nuclear reaction or a radioactive decay process in which the nucleus of an atom splits into smaller parts (lighter nuclei), often producing ... in the modern world is usually a deliberately produced manmade nuclear reaction induced by a neutron.
Description : Mass of a positron is same as that of a/an (A) Electron (B) α-particle (C) Proton (D) Neutron
Last Answer : (A) Electron
Description : The particle required to continue the chain process of Uranium fission is : (1) Electron (2) Proton (3) Neutron (4) Positron
Last Answer : Neutron
Description : Name the particle that is most essential to continue the chain reaction during the fission of uranium- (1) Electron (2) Proton (3) Neutron (4) Positron
Description : Find the minimum energy that a `gamma`-ray must have to give rise to an electron -positron pair. `{:("Mass of electron",= 0.00055 am u,),("Mass of pos
Last Answer : Find the minimum energy that a `gamma`-ray must have to give rise to an electron -positron pair. `{:("Mass ... ("Mass of positron",= 0.00055 am u,):}`
Description : Pick out the correct statement. (A) Positron is the antiparticle of electron (B) In α-decay, the ratio of neutron to proton decreases (C) Ionising power of β-rays is higher than that of α-rays (D) Speed of α-rays is more than that of γ-ray
Last Answer : (A) Positron is the antiparticle of electron
Description : Particles involved in the movement within material are A. protons B. electrons C. neutrons D. positrons
Last Answer : electrons
Description : The Doppler Effect predicts that the spectrum of light from a visible body moving AWAY from the Earth will experience a shift in frequency when viewed from Earth. This particular shift is known as the: w) Blue shift x) Neutral shift y) Red shift z) Dirac shift
Last Answer : ANSWER: Y -- RED SHIFT
Description : The band of light frequencies to which human eye will respond ∙ A. Infrared ∙ B. Visible light ∙ C. Ultraviolet ∙ D. Cosmic ray
Last Answer : B. Visible light
Description : Wave length of light between 390 to 700 is called a)Cosmic ray b) Visible light c) Non visible light d) Infra red light
Last Answer : b) Visible light
Description : What is cosmic cloud ?
Last Answer : Scientists say the creation of the sky from cosmic clouds That is, cosmic clouds means the sky
Description : The wave nature of electrons was EXPERIMENTALLY verified by: w) Einstein x) Davisson and Germer y) Balmer z) Bohr.
Last Answer : ANSWER: X -- DAVISSON AND GERMER
Description : The value of G, the universal gravitational constant, was measured experimentally by: w) Newton x) Cavendish y) Copernicus z) Kepler
Last Answer : ANSWER: X -- CAVENDISH
Description : Particle size range in which dust catcher (gravity settling chamber) works most effectively and efficiently is __________ microns. (A) < 5 (B) 10 to 25 (C) < 74 (D) > 1000
Last Answer : (C) < 74
Description : Amount of coal lost in ash particle, which is carried through the boiler system, depends upon the (A) Physical nature, ash content and fineness of the coal (B) Amount of excess air supplied and load on the boiler (C) Type of burner and combustion chamber (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : An electrical current in a superconducting ring will theoretically flow unchanged for: w) several milliseconds x) a second y) several weeks z) forever
Last Answer : ANSWER: Z -- FOREVER
Description : Good conductors have many loosely bound _____. (1) neutrons (2) protons (3) positron (4) electrons
Last Answer : (4) electrons Explanation: In a conductor, the outer electrons of the atoms are loosely bound and free to move through the material.
Description : The emission of a positron from a radioactive atom is generally accompanied by the emission of one of the following. Is it accompanied by the emission of: w) a meson x) a baryon y) an antineutrino z) a neutrino
Last Answer : ANSWER: Z -- A NEUTRINO
Description : In 1932, the first ARTIFICIAL source of radiation was created in France by two famous scientists. Name the TWO scientists.
Last Answer : ANSWER: IRENE and FREDERIC (JOLIOT-)CURIE
Description : Two parallel beams of positrons moving in the same direction will
Last Answer : Two parallel beams of positrons moving in the same direction will A. not interact with each ... bedeflected normal to the plane containing two beams
Description : Are gamma rays positrons?
Last Answer : No, they are not.Gamma rays are photons - just like light. Theyare electrically neutral. They move at the speed of light.Positrons, also known as anti-electrons, have a positive charge.They move at speeds less than the speed of light.
Description : Isotopes of the same element differ in the number of (a) Protons (b) Neutrons (c) Electrons (d) Positrons
Last Answer : Ans:(a)
Description : The nuclear particles that are assumed to hold nucleons together are (a) Electrons (b) Positrons (c) Neutrons (d) Mesons
Last Answer : Ans:(d)
Description : What particles move around the nucleus of an atom and are negatively charged? (1) Electrons (2) Protons (3) Positrons (4) Neutrons
Last Answer : (1) Electrons Explanation: Circling around outside the nucleus are tiny little particles called electrons. Electrons have a negative charge. Electrons spin as they circle the nucleus billions of times every ... or lose energy, they jump between energy levels as they are rotating around the nucleus.
Description : The nuclear particles which are assumed to hold the nucleons together are - (1) positrons (2) neutrons (3) electrons (4) mesons
Last Answer : (4) mesons Explanation: The nuclear particles which are assumed to hold the nucleons together are mesons.
Description : An inkjet printer uses in its operation: (a) Positrons (b) Neutrons (c) An electric charge (d) Photons
Last Answer : (c) An electric charge
Last Answer : Electrons
Description : .Which of the following is true: A. Antibiotics are useful in the treatment of periodontitis B. Trauma from occlusion causes thickening of the marginal gingivae C. Periodontitis is the ... can be identified by x-ray E. Periodontitis is the most common disease in the oral cavity
Last Answer : E. Periodontitis is the most common disease in the oral cavity
Description : What is the Fermi-Dirac statistics?
Last Answer : The Fermi-Dirac statistics is a type of quantum statistics that describes the behavior of fermions, which are a type of subatomic particle that follow the rules of quantum mechanics, and are important in many areas of physics, including the behavior of electrons in solids.
Description : What is the title of the recent biography of Paul Dirac, the quantum physicist?
Last Answer : answer:Is it this one? Oh, and welcome to ask-public!