Have three easy questions. 1. When converting mass to energy, is this energy equivalent to the term field. To we get photons (lots of them and high energetic) for matter? 2. Creating matter/ particles requires energy. Again, what is meant here by energy? Colliding two particles very fast yields new matter, right? Can high energy fields (gamma rays) create real matter? If so, how and where (in matter and vacuum?)? 3. Virtual matter can be created in vacuum. Does vacuum mean complete nothingness devoid also of photons? Or is it that photons turn into mater for a moment depending on how much energy they carry? Utterly confused I ask you clever people for help.