electrons

  1. K

    cusp electrons

    anyone knows what cusp elecons is? and when they appear?
  2. D

    Electrons in Quantum Field Theory

    Electrons in quantum field theory are an expanded field. They have infinite lengths. How does electron transfer in an triboelectricity or chemical process, how does the principle of the exclusion of Paul's work, which says that fermions can not occupy the same place?
  3. S

    Threshold frequency and ejection of electrons

    A sample of silver having a threshold frequency of 1.09 x 10 15 Hz is exposed to an ultraviolet light source (λ= 200 nm). This results in the ejection of electrons. What changes will be observed if: The silver is replaced with aluminum (threshold energy = 9.82 x 10 14 Hz) a) No electrons are...
  4. timemachine2

    Why do some em waves get absorbed by electrons and some em waves do not, like visible

    Why do some em waves get absorbed by electrons and some em waves do not, like visible light gets absorbed, but radio waves get transmission? What is so unique about visible light photons, for electrons to absorb them, and other em waves. But radio waves traverse solid matter. What's the...
  5. N

    Can any invisible EM waves that get absorbed by electrons pass through solid matter.?

    Can any invisible EM waves that get absorbed by electrons pass through solid matter.? Can any invisible EM waves that get absorbed by electrons pass through solid matter. Question 1. If you mixed any invisible EM waves, like X-rays , gamma waves, ultraviolet waves ,and micro waves with radio...
  6. N

    Can any INVISIBLE EM waves get electrons in solid matter, to

    -the same energy levels in glass. As they pass through the solid opaque matter.? So as Invisible EM waves like radio, X-rays, and gamma waves pass through say a 4 inch cubic block of black solid carbon. Do you think by mixing EM waves, and reducing, or increasing frequency, and wavelength you...
  7. timemachine2

    Can any INVISIBLE EM waves get electrons in solid matter, to the same energy levels i

    n glass. As they pass through the solid opaque matter. So as Invisible EM waves like radio, X-rays, and gamma waves pass through say a 4 inch cubic block of black solid carbon. Do you think by mixing EM waves, and reducing, or increasing frequency, and wavelength you could get the electrons...
  8. I

    Would any solid element be invisible/transparent if you could stop electrons from abs

    Would any solid element be invisible/transparent if you could stop electrons from absorbing, and emission light photons. So try to imagine light basically just passing through a solid element through the atoms, but there are no electrons, orbiting the atoms, or you could somehow stop the...
  9. timemachine2

    Is this the eV for electrons to move higher in shells in glass.

    Is this description for silicon in glass how much eV the electron needs to leave the ground state, and move to shell 2. Energy gap 1.12 eV? and also, Energy separation (EΓL) 4.2 eV Maybe its not the same silicone that goes into glass. solid state physics can be VERY DIFFERENT than atomic...
  10. timemachine2

    Energy bands, or amount of electrons in shells that effects absortion in absortion, a

    Would every solid object be transparent invisible if the electron never got exited fr Would every solid object be transparent invisible if the electron never got exited from the ground state, or shell level 1.? If it were possible to stop a electrons from getting excited in atoms, from all...
  11. K

    What made electrons spin?

    Spin implies angular momentum which implies torque existed at some point. However the electron appears to be a perfect sphere. http://phys.org/news/2011-05-electron-surprisingly-scientists-year.html How can torque be applied to a sphere? Your thoughts?
  12. C

    Are shell electrons accompanied by virtual neutrinos?

    Hi everyone, This is my first post. Years ago I read in a science magazine that (at least according to a certain theory) every shell electron would be accompanied by one (or was it two?) virtual neutrino(s). At least that's my recollection of what I read. I know it sounds a little crazy. I was...
  13. E

    Electric Fields Question?

    Sphere A has a mass of 4.2*10^-2 kg and is tethered to a wall by a thin thread. Sphere a has an excess of 1.2 *10^12 electrons. Sphere B has a deficit of 3.5*10^12 electrons and is 0.23 m from Sphere A a) determine the angle between the thread and the wall b) determine the tension in the...
  14. P

    Velocity of electrons (H2 Physics)

    1. The problem statement, all variables and given/known data A beam of electrons, with kinetic energy of 500eV, enters mid-way into the space between two oppositely charged parallel plates with a potential difference of 100V 2. Relevant equations Determine the velocity of the electrons 3...
  15. T

    Firing electrons at each other

    1. The problem statement, all variables and given/known data Two electrons are fired at 3.5 x 10^6 m/s directly at each other. Calculate the smallest possible distance between the two electrons. 2. Relevant equations Ee = k(q1)(q2) / r Ek = (0.5)mv^2 3. The attempt at a...
  16. A

    Final velocity of electrons under constant voltage

    Electrons are accelerated from rest by a p.d. of 100V. What is their final velocity? I have no idea how to begin. What is the relation between the voltage and motion of the electron? Thanks
  17. G

    Question on photons and a question on speeds of electrons.

    1. Find the max KE of photoelectrons emitted when a metal of work function 2.8 eV is exposed to photons of wavelength 3 x 10 Express your answer in Joules and eVs. If these electrons are the accelerated through 100 volts in a vacuum what will their final max KE be (i) in eVs (ii) in Joules...
  18. L

    How many electrons must be transferred

    A plate carries a charge of -3.7 µC, while a rod carries a charge of +2.4 µC. How many electrons must be transferred from the plate to the rod, so that both objects have the same charge?
  19. B

    Ions and Free Electrons

    Okay so I have a question to do and i have been searching through the internet and textbooks but yet to have any luck... Ions and free electrons act like condensation centers: water drops form around them when they are airborne. Explain why? I know im not supposed to just ask for the answer...
  20. M

    maximum photocurrent ejected by electrons in photoelectric effect

    In a photoelectric effect experiment, unpolarized beam of light is incident on a metal surface. Power is given as 28.0mW; frequency of the beam is 7.4* 10^14Hz; and stopping potential Vs as 1.45V. -I was able to find the wavelength of the beam of light as 405nm.(c/f) -Energy in the photon as...