A Question about power broadening

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Hello! If I have an atomic ensemble (say in a cell) with a Doppler broadened linewidth of 10 MHz and I have a laser of fixed linewidth of 1 MHz. If I keep the laser frequency fixed on the center of the atomic transition (say that I measure the laser transmission), I would see a peak of 1 MHz linewidth, but only 10% of the atoms will interact with the laser (I assume that anything beyond 1 linewidth doesn't interact just to simplify the question). If I increase the power of the laser a lot, I will have power broadening. If that makes the effective linewidth 10 MHz, does it mean that now I would see a transmitted line of 10 MHz linewidth and the laser will interact with all the atoms in the cell? Thank you!
 
Hi. I have got question as in title. How can idea of instantaneous dipole moment for atoms like, for example hydrogen be consistent with idea of orbitals? At my level of knowledge London dispersion forces are derived taking into account Bohr model of atom. But we know today that this model is not correct. If it would be correct I understand that at each time electron is at some point at radius at some angle and there is dipole moment at this time from nucleus to electron at orbit. But how...

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