The cathode had a concave spherical surface which focused the electrons into a small spot around 1 mm in diameter on the anode, in order to approximate a point source of X-rays, which gave the sharpest radiographs . The colour of the rays corresponded with the colour given to flames by the salt They did not get any effects when the oxides of calcium or barium were put in the pocket; these oxides are known when hot to give out large streams of negatively electrified corpuscles and for this reason are used for Wehnelt cathodes. It was found that a mixture of two or more salts with powdered graphite gave brighter rays than a simple salt, the best mixture seemed to be LiBr, Lil, Nal and graphite. If the connecting tube were quite straight these anode rays might be the positive rays corresponding to the cathode c, but as they appear when the tube is bent this cannot be their origin. Know updates on ICSE & CBSE class 10 & 12 latest syllabus & more. Does Jerry Seinfeld have Parkinson's disease? What Thomson did is put holes in the cathode and set up the cathode/anode at one end of a long tube. These rays produced flashes of light on ZnS screen and can pass throughs thin metal foils. Gehrcke and Reichenheim1 have discovered rays of positively charged particles which start from the anode. Cathode rays produce X-rays and light is emitted when they strike on ZnS screen. Ano ang mga kasabihan sa sa aking kababata? These rays produced flashes of light on ZnS screen and can pass throughs thin metal foils. Why.
Which is not true with respect to cathode rays? Therefore, the charge to mass ratio of anode depends on the gas.
These rays travel in straight lines and consists of positively charged particles. Ano ang Imahinasyong guhit na naghahati sa daigdig sa magkaibang araw?
Reason : Cathode rays penetrate through thick sheets. The most natural explanation of these rays is that the hot salts from which they originate act like fused electrolytes, and that the current through them into the discharge tube is carried by the ions into which the salts dissociate, the positive ion, which is a charged atom of the metallic constituent of the salt, following the current will come to the surface of the anode, will get detached from it, and under the influence of the strong electric field which exists in the gas close to the anode will acquire the high velocity characteristic of the anode rays. the conditions before starting the experiment is same- ,i.e, decreasing the pressure to an eextremely negligible level and placing cathode on one side and anode on the other.and providing very high PD(potential difference). These termed as canal rays or anode rays. (iv) Anode rays produce heating effect when struck against a metal foil. Know steps to download NEET 2020 scorecard. 400+ SHARES. Name the 5 different structural isomers of hexane. The e/m ratio of these rays is smaller than that of electrons. In other words, the value of e/m for a positive ion depends upon the charge of the ion and its mass.

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