Does anyone know how close a photon needs to be to a nucleus (an ion really, no shielding from electrons) for pp to occur? I assume it's a probability as a function of distance, any ideas/equations?
Take two lasers of the same intensity and wavelength and aim them at 30 degrees at the same spot on a mirror, so that at the surface the waves cancel perfectly.
What happens? How can the wave be reflected if there is no field present?
Does this mean that the tunnelling time was actually zero, and the electron 'skips' over the gap, or does it mean that the electron wave travelled at the speed of light followed by an instantaneous jump later on
Does anybody know what happens when say a laser accelerates charged particles?
Do photons get absorbed and the intensity of the laser drops, or do they get absorbed and scattered and there's a redshift of the photon etc
In the single slit experiment, individual photons may be diffracted. The electric field of the em wave should accelerate charged particles in the screen (if it were a capacitor for example) but only one packet of energy exists. The photon may be absorbed after many wavelengths of light have...
Will a laser exposed to ions (doped fibre) spread out in the direction of polarisation as momentum sends the peaks in one direction and the troughs in another. Or, as total momentum is 0 does the wave continue on straight.
I have charged particles (protons) accelerated by an electric field. If I add up all the momentum and find the change in momentum per sec I can find the acceleration of my craft by
dp/dt /M = a
If I add up all the kinetic energy of the particles and find the KE per sec, I can find the...
I was hoping you could help me out with this one.
Im trying to calculate the redshift or blueshift of a photon that strikes a mirror and reflects.
I know E=pc, and that 2p is the momentum transfer. I also know that kinetic energy is 2p/M (of the mirror).
However, this says that...
Could someone please clear this up for me. We have,
Reflection (metal, mirror)
Sry but I use photoelectric effect to reference electrons absorbing photons of specific energies to be excited to higher energy levels, I...
At v = c, time (hence physics) stands still.
You can never reach c, but lets say near enough.
Therefore if you accelerate at an extremely high rate, from 0 - c in perhaps a fraction of a second, wouldn't the slowing rate of physics prevent you from being crushed?
ie, is there a way of...
Trying to understand small increments of light.
From a particle perspective, a photon is the smallest increment, dependent on frequency as E=hf.
From Maxwell's wave perspective, light propagates as a result of the energy passing between the E field and the B field. The rate at which this...