Waves and radiations. Jean Pikar

you are: Waves and radiations

To tell about this opening, it is necessary to return by far times - to supervision Jean Pikar and (1620-1682) which in 1675 has noticed that the mercury barometre when it transferred to a dark room, let out in the vacuum part of flash of light. Certainly, then in any way it was impossible to use this opening; the described phenomenon, possibly, was many times observed after that remains the uttermost riddle.

Only after opening of Faradeem of an electromagnetic induction and the invention of the induction coil there was a possibility to investigate this phenomenon regularly. Produced long glass tubes and pumped out from them air to various pressure. When to tubes put a high voltage, the beautiful multi-coloured luminescence was observed.

These digit tubes as them named, represent the most remarkable devices in the experimental physics not only on outer effects, but also on those opening which have been made with their help. And who will believe in so often expressing statement as if physicists of XIX century thought what have come nearer to the physics end whereas they only have faced this new phenomenon? Few of physicists could find out so primitive thinking.