If two light streams of different strength (in terms of photons per second, same wavelength) meet diagonally, will the smaller light stream be absorbed into the larger light stream? Will their directions change?

If two light streams of different strength (in terms of photons per second, same wavelength) meet diagonally, will the smaller light stream be absorbed into the larger light stream? Will their directions change?

 

In free space, no. They will pass right through each other.

In free space, no. They will pass right through each other.

 

So the momentum of both light streams will not affect one another?

In what cases would the light streams not pass through each other?

If they are in a medium there are instances where two photons can interact with an atom where one would not.

 

Photon-photon scattering can occur (each forming a virtual electron-positron pair which then interact) but this is rare and typically involves very high-energy photons.

Thanks.