Another point though, the CTO of Ubeam had a MS in nuclear engineering from MIT and was a deputy director of innovation at Raytheon -- I expect he knows a bit of physics too. Their VP of Engineering has a PhD in acoustics and they employ other specialist PhD electrical engineers..
I appreciate a good 'take-down' as much as the next person but I don't think it's as clear cut as the napkin-math suggests.
I appreciate a good 'take-down' as much as the next person but I don't think it's as clear cut as the napkin-math suggests.