Calculating the speed of electrons?

  • Thread starter Thread starter bobo343
  • Start date Start date
  • Tags Tags
    Electrons Speed
AI Thread Summary
To calculate the speed of an electron using its De Broglie wavelength, the equation is λ = h/(mv), where λ represents the wavelength, h is Planck's constant, m is the mass of the electron, and v is its velocity. The user seeks clarification on this equation and definitions of the symbols involved. The discussion highlights the importance of understanding these fundamental concepts in particle physics. Quick responses provide the necessary information for the user's studies. Mastery of these equations is essential for further exploration in the field.
bobo343
Messages
4
Reaction score
0
I'm now studying particle physics again after a long break, so as a refresher I've been going through my old syllabus again.

Trouble is, most of my notes suck/are lost and my memory isn't so great when it comes to the specific equations.

So basically, what's the equation for working out the speed of an electron when you're given it's De Broglie wavelength?

Definitions of the symbols won't go a miss too ;P

Please and thankyou.
 
Physics news on Phys.org
the De Broglie wavelength is given by

\lambda = \frac{h}{mv}

h = Planck's constant
m = mass
v = velocity.
 
Thankyou very much for the quick reply.
 
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Thread 'Struggle to understand the concept of the question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »

Similar threads

Question about absorption line spectra
Replies
21
Views
1K
Beam current of positrons and electrons
Replies
5
Views
2K
De Broglie wavelength of electron and proton
Replies
14
Views
3K
De Broglie wavelength of an electron
Replies
3
Views
3K
What factors determine wattage of electrons flowing through a wire?
Replies
8
Views
1K
What is the wavelength of an electron of 5eV energy?
Replies
1
Views
3K
Electrons and their little role in nuclear physics
Replies
1
Views
2K
Kinetic Energy of neutron and electron
Replies
2
Views
2K
Compare and contrast a 2.2 eV photon with a 2.2 eV electron
Replies
2
Views
4K
Given current and density of electrons, what is their speed?
Replies
2
Views
2K

Hot Threads

Recent Insights

Back
Top