Hi,
How can a photon interact with a electron (ex. Compton scattering) whether the photon has no sign like positive ou negative charges?
How the field (EM wave) in the photon interact with a electron ?
Hi,
My doubt is how can the EM waves interact with an electron, i.e.,
electron is a particle with negative charge.. have EM waves any charge to attract or to repulse an electron ? :confused:
An example is the microwaves oven when waves interact with water molecules.
Thanks :smile:
harmonic motion with friction x(t)=...
Homework Statement
Anybody knows what´s the equation x(t)=... for harmonic motion with friction ?
Homework Equations
For exemple, a string-block sistem with friction ?
I need determine the position of block at t instant.
The Attempt at a Solution
If I want to know the tension on strings is possible use the algebra below ?
\SigmaFx = cos\theta T2-T3 = 0
and
\SigmaFy = sen\thetaT2-T1 = 0
so
T2=T3/cos\theta
and
T2 = T1/sen\theta
so
T1cos\theta = T3sen\theta
is this correct ?
Thanks
obs: this is not my home work, but a...
Anybody knows if there is a rule for EM radiation cross over materials ?
The wavelenght in comparison the size (or structure) of molecule is determinant ?
Ex. why infrared pass through the concrete but not metalics ?
Thank you.
Sorry, I did not say, but I would like not to use calculus for this, just geometry or algebra for demonstration.
For exemple:
the triangle area is:
A_{t} = \frac{b h} { 2 }
if I put a triangle inside a circle, where the top of it is the centre of circle, and I use infinity number of...
But is not a photon emited when a electron of this ion change energect level ( in orbit ) ?
I did imaginate that molecules from material collides ( because temperature ) each other, making electrons change betwen energy levels.
I don´t understand how can an excited atoms generate photons, ex. a incandescent lamp.
Does vibrating eletrons emit eletromagnetic fields ?
Thanks a lot