A doubt on Thomson's Experiments to determine the value of e / m_e

  • #1

Main Question or Discussion Point

By carrying out accurate measurements
on the amount of deflections observed
by the electrons on the
electric field strength or
magnetic field strength,
Thomson was able to determine
the value of e/me as...
e/me = 1.75 10^11 C kg^-1

would this be a correct understanding of this para-
"This para
is just saying that he made measurements
on how much deflection is being caused by
particular electric and magnetic field strengths
and deduced the ratio from those"
 
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Answers and Replies

  • #2
BvU
Science Advisor
Homework Helper
2019 Award
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Hi,

Why don't you provide a reference when you quote litterally, so that a helper can look at the context ?
Saves everybody time and avoids communication errors !
Even if it says copyright NCERT or something (you link, you don't copy).

The context is more didactical than historic, but I see no discrepancies with your version.
Your 'and deduced the ratio' refers to e/m but can easily be mistaken for |E|/|B| by a reader

But your title mentions doubt. About what, specifically ?
 
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  • #3
tech99
Gold Member
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"This para
is just saying that he made measurements
on how much deflection is being caused by
particular electric and magnetic field strengths
and deduced the ratio from those"
Remember that the observed ratio of field strengths was for a particular electron velocity.
 
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  • #4
Hi,

Why don't you provide a reference when you quote litterally, so that a helper can look at the context ?
Saves everybody time and avoids communication errors !
Even if it says copyright NCERT or something (you link, you don't copy).

The context is more didactical than historic, but I see no discrepancies with your version.
Your 'and deduced the ratio' refers to e/m but can easily be mistaken for |E|/|B| by a reader

But your title mentions doubt. About what, specifically ?
sorry i mean a question
 
  • Like
Likes BvU

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