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![[Post New]](/templates/default/images/icon_minipost_new.gif) 6 Apr 2008 23:09:51 IST
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In the phenomenon of electric discharge through gases at low pressaure the coloured glow in the tube appears due to 1 excitation of electrons in atoms 2collison between the atoms of the gas 3collison between the charged particles emitted from the cathode and atoms of the gas 4collison between different electrons of the atoms of the gas i think ans should be 3 am i correct please tell me rates assured please dont guess
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When there is no hope & everything in dark..........
World says go & Graves say come.........
So never loose hope & Try another way.........
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6 Apr 2008 23:18:11 IST
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i think the first one is more perfect than the 3 one
excitation of electron causes transition between them
so when white light falls on it it absorbs all colour and emit a single colour or absorbs a single colour and emitts all
the same thig as in d block or f block
also the third one can be true as collision can excite electrons
if my answer is right then please rate me or nudge me if i m wron somewhere
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6 Apr 2008 23:19:37 IST
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yes...u r correct.
at low pressre discharge,the electrons move through the discharge tube due to electric potential,and collide with stationary particles(gas atoms,in general) to produce a glow in the tube
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"Many of the things you can count,dont count....
Many of the things you cant count,really do count...."-Albert Einstein
"The important thing in science is not so much to obtain new facts as to discover new ways of thinking about them"-William Bragg
"An inexplicable fact is infinitely preferable to an incomprehensible mystery"-F. Soddy
RISHIPRATIM MAZUMDAR
NIT DURGAPUR
1ST YEAR,ELECTRONICS AND COMMUNICATIONS
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6 Apr 2008 23:21:04 IST
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yaar the glow in the electric discharge was my science project ...... its damn simple...... u just need a potentail diff. btw 2 electrodes in a gas.tube...... when the electrons will be emitted from the cathode they will have enough energy to generate vsisible light by excitation of gases by collision...... so ur answer hovers btw 1st and 3rd...... but more precise ill be 3rd..
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" the only thing thats always constant in this world , is change itself.....
so it is better to adapt to the situation or life makes you adapt to it (painfully)..."
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6 Apr 2008 23:22:32 IST
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again the aakash institute wrong thanks all of u rated u all
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When there is no hope & everything in dark..........
World says go & Graves say come.........
So never loose hope & Try another way.........
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6 Apr 2008 23:23:26 IST
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u see the diff. now............its pretty simple.... the glow is produced at all points of collision......
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" the only thing thats always constant in this world , is change itself.....
so it is better to adapt to the situation or life makes you adapt to it (painfully)..."
- Kundan a.k.a Juan dankh......
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7 Apr 2008 10:28:58 IST
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thanks for that too
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When there is no hope & everything in dark..........
World says go & Graves say come.........
So never loose hope & Try another way.........
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