The wavelength of light changes when it moves from one medium into another. This includes moving from the air into the skin. This is due to the change in refractive index between the air and the skin. It happens all the time whenever light changes media.
You can read our paper here…
What does this mean? Well, it means that the wavelengths we fire out of our lasers (the ‘fundamental wavelengths as defined in a vacuum’) all shorten when the light energy is flying around inside the skin. They always shorten becuase the refractive index of the skin is always greater than that of the air (which is usually set at 1.0).
We explain why this happens in our short letter. It’s a bit technical, but not too difficult to understand. It doesn’t change how we should approach our treatments, but it does inform those doing basic lab measurements in future.
I hope you learn something from it.
Ciao for now,
Mike.
Mike Murphy's Blog 