Wilhalm Roentgen (1845-1923) in 1895 showed that when electrons strike a material in the cathode ray tubes, produce rays which can cause fluorescence in the fluorescent materials placed outside the cathode ray tubes.
i have doubt in this lines...
look we know that cathod rays carry something which can change thw directions of pin or ball which was kept during experiment.. then why in this metal it strikes but produce rays???
Answers
Answered by
2
Actually, the cathode rays, constituting of electrons can only move light objects like light paddle wheel when set freely.
Now, X-rays are produced whenever the electrons are suddenly decelerated due to its collision with a heavy metal target.
If the striking electrons have sufficient energy, they can just click an electron out of an inner shell of the target metal atoms. These electrons obviously cannot move such a heavy tarket.
This thus results in emission of electromagnetic rays as X-rays, consisting of photons of higher energy than visible light radiations. i hope you got it now! Notice every where i have used heavy metal target! Because X-rays are not produced without them.
Attachments:
Similar questions