Physics

A single photon in empty space is converted into an positron and an electron, each with rest mass 511Mev.

(a) show this transformation is not possible (dynamaically).
(b)How could this transformation be made posible.
(c)what is the minimum photon energy required to enable the process in part b.

please show working

  1. 👍 0
  2. 👎 0
  3. 👁 109
  1. I have nothing more to add to my previous answer.
    ttp://www.jiskha.com/display.cgi?id=1307558664

    1. 👍 0
    2. 👎 0
  2. There should have been an "h" at the beginning of the link I posted.

    For a discussion of why a third body is required for pair creation, see
    http://books.google.com/books?id=GgFjLiZDOk8C&pg=PA118&lpg=PA118&dq=electron+positron+creation+third+body&source=bl&ots=w0H9QEXfMC&sig=_0Cl-HfHIyIdgCE5xlKSMCqckog&hl=en&ei=oUf1TcTpD-XRiAKzl5mGBw&sa=X&oi=book_result&ct=result&resnum=3&ved=0CCIQ6AEwAg#v=onepage&q=electron%20positron%20creation%20third%20body&f=false

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry

    The energies, E, for the first few states of an unknown element are shown here in arbitrary units: n= 1, E=-21 n=2, E=-9 n=3, E=-4 n=4, E=-3 ...,... infinity, 0 A gaseous sample of this element is bombarded by photons of various

    asked by tec on March 19, 2014
  2. Nuclear Chemistry

    The half- life of a positron is very short. it reacts with an electron, and the masses of both are converted to two gamma-ray photons: (0e+1)+ (0e-1)---> 2γ (the 0 in front of e is the mass # and behind it is the atomic #) (γ

    asked by Anonymous on June 13, 2012
  3. Physics

    Zinc has a work function of 4.30 ev . A 4.50eV photon strikes the surface and an electron is emitted. What is the maximum possible speed of the electron?

    asked by paige on November 28, 2011
  4. Physics

    A photon having wavelength λ scatters off a free electron at A (see figure below), producing a second photon having wavelength λ'. This photon then scatters off another free electron at B, producing a third photon having

    asked by melanie on June 17, 2015
  1. Physics

    An electron begins in the n = 7 orbital of a hydrogen atom. It then emits a photon of wavelength λ and falls to a lower energy level. Before it has a chance to change levels again, it absorbs a 10 eV photon and is ejected from

    asked by Luke Koch on November 26, 2019
  2. The Binding Energy of Electrons?

    An X-ray photon of wavelength 0.954 nm strikes a surface. The emitted electron has a kinetic energy of 935 eV. What is the binding energy of the electron in kJ/mol? [KE =1/2 mv^2; 1 electron volt (eV) = 1.602 x 10^- 19 J]

    asked by Amy on November 26, 2012
  3. physics

    a photon whose energy equals the rest energy of the compton collision with an electron, if the electron moves off an angle of 40 degrees to the original photon direction, what is the energy of the scattered photon? assume all

    asked by brite on March 14, 2017
  4. Physics

    An X-ray scattering from an electron with negligible initial kinetic energy is observed to undergo a change in wavelength by 2.561 pm. i.e. The scattered X-ray photon has a wavelength 2.561 pm larger than the incident X-ray

    asked by Alphonse on December 3, 2012
  1. Chemistry

    The energies, E, for the first few states of an unknown element are shown here in arbitrary units. n 1 E -11 n 2 E -5 n 3 E -2 n 4 E -1 n ... E ... n infinite E 0 A gaseous sample of this element is bombarded by photons of various

    asked by Anonymous on October 30, 2012
  2. Science

    I have a question from an old exam that I need help to understand, i'm not sure where to start An electron in an electronically excited hydrogen atom undergoes a transition from a 6d to a 2p orbital, resulting in the emission of a

    asked by Dan on October 15, 2015
  3. Chemistry

    When an electron makes a transition from the n=3 to the n=2 hydrogen atom bohr orbit, the energy difference between these two orbits (3.0x10^-19 J) is given off in a photon of light. The relationship ... between the energy of a

    asked by Wyatt on October 24, 2010
  4. Chemistry (Electrons in Atoms)

    True or False. 1)Electrons give off light as they drop to lower energy levels. 2)Electrons travel around the nucleus as waves. 3)A photon of low frequency light has more energy than a photon of high frequency light. 4)Orbitals

    asked by Jennie on May 22, 2011

You can view more similar questions or ask a new question.