<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><!--StartFragment--><p class="MsoTitle" style="margin-right:-.5in"><span style="font-family:"Times New Roman""><b><span class="Apple-tab-span" style="white-space:pre"> </span>Seminar
on<o:p></o:p></b></span></p><p class="MsoTitle" style="margin-right:-.5in"><span style="font-size:8.0pt;
font-family:"Times New Roman""><b> <o:p></o:p></b></span></p><p class="MsoNormal" align="center" style="text-align:center"><span style="letter-spacing: 1.5pt; "><b><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;">Modern Optics and Spectroscopy<o:p></o:p></span></font></b></span></p>
<div class="MsoNormal"><span style="font-family: Arial; letter-spacing: 1pt; "><b><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;"> <o:p></o:p></span></font></b></span></div><p class="MsoNormal" align="center" style="text-align:center"><span class="apple-style-span"><b><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;">Resonance energy
transfer theories: from experiments to classical theory to quantum mechanical
theories</span></font></b></span><span style="font-family: Arial; letter-spacing: 1pt; "><b><i><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;"><br><br></span></font>
</i></b></span><span style="letter-spacing: 1pt; "><b><i><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;"><o:p></o:p></span></font></i></b></span></p><p class="MsoNormal" align="center" style="text-align:center"><b><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;">Barry Masters</span></font></b><span style="letter-spacing: 1pt; "><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;">, <o:p></o:p></span></font></span></p><p class="MsoNormal" align="center" style="text-align:center"><span style="letter-spacing: 1pt; "><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;">Massachusetts Institute of
Technology<o:p></o:p></span></font></span></p><p class="MsoNormal" align="center" style="text-align:center"><span style="letter-spacing: 1pt; "><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;"> <o:p></o:p></span></font></span></p><p class="MsoNormal" align="center" style="text-align:center"><span style="letter-spacing: 1pt; "><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;">Tuesday, March 1, 2011</span></font></span><span style="letter-spacing: 1pt; "><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;"><o:p></o:p></span></font></span></p><p class="MsoNormal" align="center" style="text-align:center"><span style="letter-spacing: 1pt; "><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;"> <o:p></o:p></span></font></span></p><p class="MsoNormal" align="center" style="text-align:center"><span style="letter-spacing: 1pt; "><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;">12:00 – 1:00 p.m</span></font></span><span class="Apple-style-span" style="color: rgb(0, 0, 128); font-family: Arial; font-size: 14px; "> </span></p>
<div class="MsoNormal"><span style="font-family: Arial; color: navy; "><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;"> <o:p></o:p></span></font></span></div>
<div class="MsoNormal"><span style="font-family: Arial; color: navy; "><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;"> <o:p></o:p></span></font></span></div>
<div class="MsoNormal"><span style="font-family: Arial; color: navy; "><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;"> <o:p></o:p></span></font></span></div>
<div class="MsoNormal"><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;">Resonance energy transfer is a powerful technique to measure
distances and structural changes in the nanometer scale. The plethora of
applications of this technique to chemistry, biology and medicine is a metric
of the impact of this optical technique. Scientists often use the textbook
formulations of the rate equations; however, sometimes without a critical
understanding of the inherent assumptions and limitations of the theory, to
derive quantitative conclusions. Where did these mathematical formulations of
resonance energy transfer come from? What experiments indicated the existence
of the phenomena? This talk provides insights into the theoretical developments
and the experiments of all the scientists who came before Theodor Förster. I
have reviewed the French and German papers that described the physics of energy
transfer. The theorists and the experimentalists include: the Perrins (father
and son), Heisenberg (1926-his paper on energy transfer between two harmonic
oscillators), Kallmann and London, Förster's Classical theory of Resonance
Energy Transfer (1946), Förster Quantum Theory of resonance Energy Transfer
(1948), Oppenheimer and Arnold (1950), and Hans Kuhn. I describe the physical
aspects of these theories, the approximations used (dipole-dipole interactions;
vibronic interactions etc) and the mathematics of their theories. Finally, how
were each of these theories validated (or not) by experimental results. What
are the limitations of each theory and when are they inappropriately used? <o:p></o:p></span></font></div><p class="MsoNormal" align="center" style="text-align:center"><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;"> <o:p></o:p></span></font></p><p class="MsoNormal" align="center" style="text-align:center"><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;"> </span></font><o:p></o:p></p><p class="MsoNormal" align="center" style="text-align:center"><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;">Grier Room, MIT Bldg 34-401<o:p></o:p></span></font></p><p class="MsoNormal" align="center" style="text-align:center"><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;">Refreshments served after the lecture</span></font><o:p></o:p></p>
<!--EndFragment-->
</body></html>