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![[Post New]](/templates/default/images/icon_minipost_new.gif) 21 Mar 2008 13:08:22 IST
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Q. When alpha particles are sent through a thin foil, most of them go straight through the foil because: 1. alpha particles are much heavier than electrons 2. alpha particles are positively charged 3. most part of the atom is vacant 4. alpha particles move with high velocity. More than one options are correct... answer with explanation...rates assured...
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21 Mar 2008 13:09:39 IST
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3., 4
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1 is true..its because of their very heavy size compard to elec tht the force due to elec causes minimal deflection
edit:
akhil 1 also na?
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21 Mar 2008 13:14:13 IST
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ya akhil the above user is correct....1 also is correct...
my main doubt lies in for the 4th option...
in the answer only 1, 3 are given correct...4th isn't there....
can any1 give the xplanation for the 4th option not being correct...???
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PROGRESS ISN'T MADE BY EARLY RISERS OR HARD WORKERS, BUT BY LAZY PEOPLE TRYING TO FIND EASIER WAY TO DO THE SAME.....SO BE LAZZZZYY!!!! |
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21 Mar 2008 13:15:50 IST
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force on alpha particles depend only on mass ,chrg dist etc..
how is it related to vel??
am i missing sumtin here?
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21 Mar 2008 13:18:41 IST
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the answer should be1 3 and 4
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21 Mar 2008 13:25:40 IST
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@ computer001...
had the alpha particles been launched with a slow speed...
they certainly would have come in ineraction with the electrons.
and i think high velocity can't be neglected...
@kewlslayer
the answer is given as 1 and 3.
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PROGRESS ISN'T MADE BY EARLY RISERS OR HARD WORKERS, BUT BY LAZY PEOPLE TRYING TO FIND EASIER WAY TO DO THE SAME.....SO BE LAZZZZYY!!!! |
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21 Mar 2008 13:27:41 IST
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but answer 1 is not explaining the reason...the fact tht alpha particles are heavy is true but then it doesnt explain y they go undeflected.....?????i think the ans is only 3....
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21 Mar 2008 13:28:23 IST
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the alpha particle impacts the foil with high velocity for it to deviate a strong electrostatic force is needed which is not present.the electrostatic force is relatively less
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21 Mar 2008 13:30:22 IST
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i think 4 should also be true
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21 Mar 2008 13:38:59 IST
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svj
there is interaction with electrons
n this does not matter with speed...the reason it does not get affected in its path is tht the effective acc in a diff direction caused on the alpha particle is extremely small
how can u say vel matters?
field due to electrons or ne chrgd particles travel @ speed pf light so watever speed u send it the alpha particla cannot evade the field..
so i still stick to the fact tht vel does not matter
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21 Mar 2008 13:44:20 IST
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i cannot understand how then ans can be 1 the repulsion is between nucleus from where have these electrons came into picture my ans 3,4 ( i think the given ans is wrong)
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21 Mar 2008 13:46:29 IST
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ya dude correct explanation thanks...
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PROGRESS ISN'T MADE BY EARLY RISERS OR HARD WORKERS, BUT BY LAZY PEOPLE TRYING TO FIND EASIER WAY TO DO THE SAME.....SO BE LAZZZZYY!!!! |
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21 Mar 2008 13:48:28 IST
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@balganesh 1 surely is correct...
because i think that the electrostatic force depends on the masses of the bodies....
had the mass of alpha particle be negligible...it would surely have interacted with the electrons...
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PROGRESS ISN'T MADE BY EARLY RISERS OR HARD WORKERS, BUT BY LAZY PEOPLE TRYING TO FIND EASIER WAY TO DO THE SAME.....SO BE LAZZZZYY!!!! |
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21 Mar 2008 13:49:09 IST
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