x x t t1 photoelectriceect nobelprizetoeinstein

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Unformatted text preview: v=E/H
 •  Turn
off
magneKc
field,
the
deflecKon
kineKc
energy
is
 1/2mu2=qE
*
u/2
*
t


(u
is
perpendicular
to
v)
‐>

 u
=
(q/m)*E
*
L/v
=
(q/m)
E
*
L/(E/H)
 u/v
=
tan(Θ)=
(q/m)
*
E
*
L/(E/H)2
 What
is
the
charge
of
the
electrons?
 (Millikan
experiments)
 Balancing
gravitaKon
force
(mg)
with
electrostaKc
force
(qE)
 Indicates
that
the
charge
q
is
coming
in
whole
mulKples
 Q
=
e
,
2e

,
3e,
….


e=‐1.6x10‐19C
 ‐>
electron
is
a
parKcle!
 Light
 •  ElectromagneKc
radiaKon
 •  λ
‐‐
wavelength
(typically
measured
in
 nanometers)
 •  ν
–
the
frequency
(measured
in
se...
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This document was uploaded on 03/04/2014 for the course CH 354L at University of Texas at Austin.

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