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

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
by

1 Answer

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,):}`
by
selected by

Related questions

Calculate the amount of energy set free by the annigilation of an electron and a positron. Given that mass of electron `= 0.00055` amu and positron =

Description : Calculate the amount of energy set free by the annigilation of an electron and a positron. Given that mass of electron `= 0.00055` amu and positron =

Last Answer : Calculate the amount of energy set free by the annigilation of an electron and a positron. Given that ... 0.00055` amu and positron = 0.00055 amu.

If energy of incident photon is greater than the rest mass energy of electron positron pair, the surplus energy is shared by the pair as, a) Potential energy b) Thermal energy c) Electronic energy d) Kinetic energy

Description : If energy of incident photon is greater than the rest mass energy of electron positron pair, the surplus energy is shared by the pair as, a) Potential energy b) Thermal energy c) Electronic energy d) Kinetic energy

Last Answer : d) Kinetic energy

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

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

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

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 

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

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

Gamma rays are - (1) High energy electrons (2) Low energy electrons (3) High energy electromagnetic (4) High energy positron waves

Description : Gamma rays are - (1) High energy electrons (2) Low energy electrons (3) High energy electromagnetic (4) High energy positron waves

Last Answer : (3) High energy electromagnetic Explanation: Gamma rays (γ) refer to electromagnetic radiation of an extremely high frequency and therefore consist of high energy photons.

Mass of a positron is same as that of a/an (A) Electron (B) α-particle (C) Proton (D) 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

Max Planck received the noble prize in Physics in 1918 for his discovery of ? A. electron B. energy quanta (Answer) C. photon D. positron

Description : Max Planck received the noble prize in Physics in 1918 for his discovery of ? A. electron B. energy quanta (Answer) C. photon D. positron

Last Answer : B. energy quanta (Answer)

What is the mass of gamma ray ?

Description : What is the mass of gamma ray ?

Last Answer : Gum ray mass 9.11 x 10-31kg

Dirac theoretically predicted the existence of the positron. Who experimentally identified positrons in 1932 in cloud chamber pictures of cosmic ray particle tracks?

Description : Dirac theoretically predicted the existence of the positron. Who experimentally identified positrons in 1932 in cloud chamber pictures of cosmic ray particle tracks?

Last Answer : ANSWER: (C. D.) ANDERSON

Decrease in atomic number is observed during a)`alpha`-emission b)`beta`-emission c)positron emission d)electron capture

Description : Decrease in atomic number is observed during a)`alpha`-emission b)`beta`-emission c)positron emission d)electron capture

Last Answer : Decrease in atomic number is observed during a)`alpha`-emission b)`beta`-emission c)positron emission ... `-emission C. positron emission D. K-capture

The particle required to continue the chain process of Uranium fission is – (1) Electron (2) Proton (3) Neutron (4) Positron

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.

The antiparticle of an electron is – (1) Positron (2) Proton (3) Alpha particles (4) Beta particles

Description : The antiparticle of an electron is – (1) Positron (2) Proton (3) Alpha particles (4) Beta particles

Last Answer : (1) Positron Explanation: Corresponding to most kings of particles, there is an associated antiparticle with the same mass and opposite charge (including electric charge). The antiparticle of the ... radioactive decay. The opposite is also true: the antiparticle of the positron is the electron.

Which of the following is not a nucleon? (1) Proton (2) Neutron (3) Electron (4) Positron

Description : Which of the following is not a nucleon? (1) Proton (2) Neutron (3) Electron (4) Positron

Last Answer : (4) Positron Explanation: Nucleon is one of the particles that makes up the atomic nucleus. Each atomic nucleus consists of one or more nucleons, and each atom in turn consists of a cluster of ... nucleon number may be used in place of the more common terms mass number or atomic mass number.

The fundamental particles present in the nucleus of an atom are - (1) Electron, proton (2) Proton, neutron (3) Neutron, electron (4) Neutron, positron

Description : The fundamental particles present in the nucleus of an atom are - (1) Electron, proton (2) Proton, neutron (3) Neutron, electron (4) Neutron, positron

Last Answer : (2) Proton, neutron Explanation: The nucleus is the very dense region consisting of protons and neutrons at the center of an atom. It was discovered in 1911, as a result of Ernest Rutherford's ... mass of an atom is located in the nucleus, with a very small contribution from the orbiting electrons.

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 : 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.

Positron is a/an (A) Nucleus having two protons (B) Helium nucleus (C) Electron with positive charge (D) Nucleus with one proton and one neutron

Description : Positron is a/an (A) Nucleus having two protons (B) Helium nucleus (C) Electron with positive charge (D) Nucleus with one proton and one neutron

Last Answer : (C) Electron with positive charge

The decrease in the atomic number is not observed in case of (A) Electron capture (B) β-emission (C) α-emission (D) Positron emission

Description : The decrease in the atomic number is not observed in case of (A) Electron capture (B) β-emission (C) α-emission (D) Positron emission

Last Answer : (B) β-emission

The anti-particle to an electron is: w) proton x) positron y) neutron z) anti-proton

Description : The anti-particle to an electron is: w) proton x) positron y) neutron z) anti-proton

Last Answer : ANSWER: X -- POSITRON

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 electron, and an antineutrino y) a proton, an electron, and a positron z) a neutrino and an antineutrino

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 

Who first theoretically predicted the existence of the positron, a positively charged electron? He received the Nobel Prize in Physics in 1933.

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

The antiparticle of an electron is (1) Positron (2) Proton (3) Alpha particles (4) Beta particles

Description : The antiparticle of an electron is (1) Positron (2) Proton (3) Alpha particles (4) Beta particles

Last Answer : Positron

The particle required to continue the chain process of Uranium fission is : (1) Electron (2) Proton (3) Neutron (4) Positron

Description : The particle required to continue the chain process of Uranium fission is : (1) Electron (2) Proton (3) Neutron (4) Positron

Last Answer : Neutron

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 : 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 : Neutron

Which of the following is not a nucleon? (1) Proton (2) Neutron (3) Electron (4) Positron

Description : Which of the following is not a nucleon? (1) Proton (2) Neutron (3) Electron (4) Positron

Last Answer : Positron

The fundamental particles present in the nucleus of an atom are (1) Electron, proton (2) Proton, neutron (3) Neutron, electron (4) Neutron, positron

Description : The fundamental particles present in the nucleus of an atom are (1) Electron, proton (2) Proton, neutron (3) Neutron, electron (4) Neutron, positron

Last Answer : Proton, neutron

When the electron of a hydrogen atom jumps from the n=4 to the n=1 state , the number of all pos - sible spectral lines emitted is :-

Description : When the electron of a hydrogen atom jumps from the n=4 to the n=1 state , the number of all pos - sible spectral lines emitted is :-

Last Answer : When the electron of a hydrogen atom jumps from the n=4 to the n=1 state , the number of all pos - sible spectral ... is :- A. 15 B. 6 C. 3 D. 4

Select the arrangement of electromagnetic radiation which starts with the lowest energy and increases to greatest energy? A. radio, visible, infrared, ultraviolet, x-ray, gamma ray B. radio, infrared, visible, x-ray, gamma ray, ultraviolet C. visible, radio, infrared, ultraviolet, x-ray, gamma ray D. radio, infrared, visible, ultraviolet, x-ray, gamma ray (Answer)

Description : Select the arrangement of electromagnetic radiation which starts with the lowest energy and increases to greatest energy? A. radio, visible, infrared, ultraviolet, x-ray, gamma ray B. radio, infrared, visible ... -ray, gamma ray D. radio, infrared, visible, ultraviolet, x-ray, gamma ray (Answer)

Last Answer : D. radio, infrared, visible, ultraviolet, x-ray, gamma ray (Answer)

How Are the atomic and mass number Affected by positron emission?

Description : How Are the atomic and mass number Affected by positron emission?

Last Answer : What is the answer ?

Which is the electromagnetic wave ? ① Alpha ray , ② beta ray , gamma ray , ④ cathode ray

Description : Which is the electromagnetic wave ? ① Alpha ray , ② beta ray , gamma ray , ④ cathode ray

Last Answer : Gamma ray electromagnetic waves.

What is gamma ray ?

Description : What is gamma ray ?

Last Answer : Gamma ray is a type of electromagnetic wave emitted by nuclear explosion and radioactivity The gamma ray was discovered in 1900 by the French chemist and physicist Paul Willard. It is expressed by. Gamma rays are emitted from the sun.

What is the religion of gamma ray ?

Description : What is the religion of gamma ray ?

Last Answer : ( 1) Gamma rays are electromagnetic waves of very short wavelength. (2) Gamma rays have no mass. (3) Gamma rays have no charge. (4) The wavelength of gamma ray is much less than the ... like light. Gamma ray has all the luminous properties like reflection , refraction , excitation , refraction etc.

What is the speed of gamma ray ?

Description : What is the speed of gamma ray ?

Last Answer : Gamma ray speed 3 X 108ms-1

What is the speed of gamma ray equal to what speed ?

Description : What is the speed of gamma ray equal to what speed ?

Last Answer : The speed of gamma ray is equal to the speed of light

What is the wavelength of gamma ray ?

Description : What is the wavelength of gamma ray ?

Last Answer : The wavelength of gamma rays is short

What is a gamma-ray burst, and how does it happen?

Description : What is a gamma-ray burst, and how does it happen?

Last Answer : It happens when two gamma rays come from different stars and collide and make a big explosion . A gamma ray burst is when two gamma rays come from different stars and collide and make a big explosion. BOOM

Isobar is produced by the emission of which of the following? (1) X-ray (2) Gamma ray (3) Beta ray (4) Alpha ray

Description : Isobar is produced by the emission of which of the following? (1) X-ray (2) Gamma ray (3) Beta ray (4) Alpha ray

Last Answer : (3) Beta ray Explanation: Isobar, in nuclear physics, any member of a group of atomic or nuclear species all of which have the same mass number-that is, the same total number of protons and ... because either a neutron is converted to a protonor a proton is converted to a neutron in the process.

Half life is a term used to describe a) The penetrating ability a gamma source b) Half the total time a gamma source will be useful c) The time taken for the gamma source to reduce the strength by half d) The rate of decay of an X-ray tube

Description : Half life is a term used to describe a) The penetrating ability a gamma source b) Half the total time a gamma source will be useful c) The time taken for the gamma source to reduce the strength by half d) The rate of decay of an X-ray tube

Last Answer : c) The time taken for the gamma source to reduce the strength by half

The region of the electromagnetic spectrum immediately above the frequencies to which the human eye is sensitive is called: A. I r B. ultra-violet C. r f D. gamma ray

Description : The region of the electromagnetic spectrum immediately above the frequencies to which the human eye is sensitive is called: A. I r B. ultra-violet C. r f D. gamma ray

Last Answer : B. ultra-violet

The region of the electromagnetic spectrum immediately above the frequencies to which the human eye is sensitive is called: w) ir x) ultra-violet y) rf z) gamma ray

Description : The region of the electromagnetic spectrum immediately above the frequencies to which the human eye is sensitive is called: w) ir x) ultra-violet y) rf z) gamma ray

Last Answer : ANSWER: X -- ULTRA-VIOLET

Assertion. Snakes exposed to gamma rays become non- poisonous. Reason. Poisonous snakes have poison glands and a pair of fangs. They are affected by g

Description : Assertion. Snakes exposed to gamma rays become non- poisonous. Reason. Poisonous snakes have poison glands and a pair of fangs. They are affected by g

Last Answer : Assertion. Snakes exposed to gamma rays become non- poisonous. Reason. Poisonous snakes have poison ... . If both Assertion and Reason are false.

In radioactive decay, the emission of an electron is characteristic of: w) Alpha decay x) Beta decay y) Gamma decay z) X-rays

Description : In radioactive decay, the emission of an electron is characteristic of: w) Alpha decay x) Beta decay y) Gamma decay z) X-rays

Last Answer : ANSWER: X -- BETA DECAY

Pick out the wrong statement. (A) The ratio of the density of the 'nucleus' to that of the 'atom' is 10 12 (B) α-particle is identical with a doubly charged helium ion (C) The mass of deuterium atom is half that of helium atom (D) Gamma rays are high energy electrons

Description : Pick out the wrong statement. (A) The ratio of the density of the 'nucleus' to that of the 'atom' is 10 12 (B) α-particle is identical with a doubly charged helium ion (C) The mass of deuterium atom is half that of helium atom (D) Gamma rays are high energy electrons

Last Answer : (D) Gamma rays are high energy electrons

Gamma rays are similar to X rays in which of the following ways? w) they have neither rest mass nor charge x) they can be bent in an electric field y) they originate within the nucleus z) they are of low energy

Description : Gamma rays are similar to X rays in which of the following ways? w) they have neither rest mass nor charge x) they can be bent in an electric field y) they originate within the nucleus z) they are of low energy

Last Answer : ANSWER: W -- HAVE NEITHER REST MASS NOR CHARGE

An x-ray photon collides with a free electron, and the photon is scattered. During this collision there is conservation of: w) momentum but not energy x) neither momentum nor energy y) energy but not momentum z) both momentum and energy

Description : An x-ray photon collides with a free electron, and the photon is scattered. During this collision there is conservation of: w) momentum but not energy x) neither momentum nor energy y) energy but not momentum z) both momentum and energy

Last Answer : ANSWER: Z -- BOTH MOMENTUM AND ENERGY 

The constant-speed electrons of an electron bunch in a reflex klystron must remain in the repeller field for what minimum time?

Description : The constant-speed electrons of an electron bunch in a reflex klystron must remain in the repeller field for what minimum time?

Last Answer : Three-quarter cycle.

Gamma rays have greatest similarity with – (1) α-rays (2) β-rays (3) X-rays (4) U.V.-rays

Description : Gamma rays have greatest similarity with – (1) α-rays (2) β-rays (3) X-rays (4) U.V.-rays

Last Answer : (3) X-rays Explanation: Gamma radiation, also known as gamma rays or hyphenated as gamma-rays and denoted as y, is electromagnetic radiation of high frequency and therefore high energy. Gamma rays ... from high energy states of atomic nuclei (gamma decay), but are also created by other processes.

Gamma rays have greatest similarity with (1) a-rays (2) b-rays (3) X-rays (4) U.V.-rays

Description : Gamma rays have greatest similarity with (1) a-rays (2) b-rays (3) X-rays (4) U.V.-rays

Last Answer : X-rays

A radioactive substance does not undergo any change (in mass or charge) during (1) gamma-emission (2) oxidation (3) alpha-emission (4) beta-emission

Description : A radioactive substance does not undergo any change (in mass or charge) during (1) gamma-emission (2) oxidation (3) alpha-emission (4) beta-emission

Last Answer : gamma-emission

A light ray travelling from denser to rarer medium at an angle of incidence more than critical angle of concerned media pair suffers. (1) reflection (2) refraction (3) diffraction (4) total internal reflection

Description : A light ray travelling from denser to rarer medium at an angle of incidence more than critical angle of concerned media pair suffers. (1) reflection (2) refraction (3) diffraction (4) total internal reflection

Last Answer : (4) total internal reflection Explanation: If the angle of incidence of light ray in the denser medium is greater than the critical angle of the concerned media pair, the light is not at all reflected in to the rarer medium but is totally reflected. This is known as 'total internal reflection'.