How to increase wave amplitudes

[drl]

In reading about the photoelectric effect I noted that frequency accounts for the energy of the photon which must be high enough to liberate free electrons and the amplitude is the cause of intensity.Now, how can the amplitude be responsible for more than the liberation of more than one photon and I wonder if 2 or more coherent waves can combine so that the frequency remains the same and the amplitude increases with additional photons to increase intensity,.otherwise, how is intensity mediated? Thanks for your time and efforts.

 

[jtbell]

In the classical picture, increasing the intensity of the light (more precisely, the energy flux density a.k.a. power density joules per m² per second) increases the amplitudes of the electric and magnetic fields (volts per meter, and tesla, respectively) in the light waves.

In the quantum picture, increasing the intensity of the light (for a given fixed frequency) increases the number of photons arriving at a surface per m² per second. The energy per photon depends on the frequency or wavelength of the light.

I wonder if 2 or more coherent waves can combine so that the frequency remains the same and the amplitude increases with additional photons to increase intensity

Yes, according to the statements above.

 

[drl]

Now, was just wondering if 2 photons of light can combine to produce an increase in amplitude, can 2 electrons combine to produce an increase in frequency and energy in order to explain tunneling?

 

[Vanadium 50]

, can 2 electrons combine

No.