But wire fence, through which pressure and shock wave pass almost without resistance, is really such a totally impenetrable barrier for electromagnetic waves, as well as a grounded vacuum tube grid (picture)
(Larawan) Air ay isang sangkap Iyon Karaniwan hindi constitue at kahit minomum hadlang para sa mga electromagnetic waves, sa kaibahan sa shock at presyon wave, ito ay napaka-makabuluhang inhibited doon, hanggang sa wakas ganap na mawala.