Fucking stupid democrats.
Take a strong flashlight. Stick it in your mouth. The light will go through your stupid faces.
Trans-illumination is what it’s called.
Next,… stick that same flashlight into your rectum.
EMR penetrates human head.
Emitter is placed on skin of the human.
Suggestion other wavelengths would penetrate. This notion is chiefly dependent on how water interacts with the wavelength of EMR in question. Visible light penetrates water without significant absorption. The human is mostly water as it turns out.