The battery was reinvented, due to it's first development, in what is now modern day Iran, being lost over time. The antenna, however, has not been forgotten so could not have been "reinvented". Redesigned, perhaps, or a new type of antenna may have been invented, but the antenna on my roof is still there, and is still a variation of the first dipole antenna invented by Heinrich Hertz. This seems to be a variation of the phased array, just on a molecular scale, who's development has been filtered through
Highly REactive: Add water and it burns. Not an issue when it's a trace of gas in, say, a "gassy vacuum tube" the size of a grain of rice.
The isotope you mine is the (only) stable one. You can get radioactive isotopes from reactor waste - but you can get radioactive isotopes of just about ANY element from reactor waste.
Lasers are often small diodes these days. Shining two through a glass capsule - then into an absorber in one case and a photodetector in the other - is no big deal.
doesn't necessarily have to be radioactive to be excited. electrons get excited for a variety of reasons. birthdays, the color periwinkle blue, experience electricity with a potential hot date. that sort of thing.
reinvented the antenna from scratch
The battery was reinvented, due to it's first development, in what is now modern day Iran, being lost over time. The antenna, however, has not been forgotten so could not have been "reinvented". Redesigned, perhaps, or a new type of antenna may have been invented, but the antenna on my roof is still there, and is still a variation of the first dipole antenna invented by Heinrich Hertz. This seems to be a variation of the phased array, just on a molecular scale, who's development has been filtered through
highly radioactive
No.
Highly REactive: Add water and it burns. Not an issue when it's a trace of gas in, say, a "gassy vacuum tube" the size of a grain of rice.
The isotope you mine is the (only) stable one. You can get radioactive isotopes from reactor waste - but you can get radioactive isotopes of just about ANY element from reactor waste.
Lasers are often small diodes these days. Shining two through a glass capsule - then into an absorber in one case and a photodetector in the other - is no big deal.
Nobody has cared about radio for 15 years. Inventing a new form of radio is interesting but pointless.
So you don't use a smartphone or a wireless router, or any form of wireless transmission? You don't care because radio is everywhere.