We present a photon counting experiment designed for an undergraduate physics laboratory. The statistics of the number of photons of a pseudo-thermal light source is studied in two limiting cases: much longer and much shorter than the coherence time, giving Poisson and Bose-Einstein distributions, respectively. The experiment can be done in a reasonable time using a digital oscilloscope without the need of counting boards. The use of the oscilloscope has the advantage of allowing the storage of the data for further processing. The stochastic nature of the detection phenomena adds additional value because students are forced to do data processing and analysis.

1.
F. T.
Arecchi
, “
Measurement of the statistical distribution of Gaussian and laser sources
,”
Phys. Rev. Lett.
15
,
912
916
(
1965
).
2.
Richard P.
Feynman
,
Robert B.
Leighton
, and
Matthew
Sands
,
Feynman Lectures on Physics
(
Addison-Wesley
, Reading, MA,
1965
), Vol.
3
, Chap. 4.
3.
Rodney
Loudon
,
The Quantum Theory of Light
, 3rd ed. (
Oxford U.P.
, New York,
2000
), p.
117
.
4.
P. A.
Tipler
,
Foundations of Modern Physics
(
Worth Publishers
, New York,
1969
), Chap. 3.
5.
R. A.
Serway
,
C. J.
Moses
, and
C. A.
Moyer
,
Modern Physics
, 3rd ed. (
Thomson Brooks/Cole
,
Belmont, CA
,
2005
), p.
346
.
6.
M. G.
Bulmer
,
Principles of Statistics
(
Dover
, New York,
1979
), p.
81
.
7.
R.
Lupton
,
Statistics in Theory and Practice
(
Princeton U.P.
, New York,
1993
), p.
14
.
8.
P.
Koczyk
,
P.
Wiewior
, and
C.
Radzewicz
, “
Photon counting statistics—Undergraduate experiment
,”
Am. J. Phys.
64
,
240
245
(
1996
).
9.
L.
Mandel
, “
Fluctuations of photon beams: The distribution of the photoelectrons
,”
Proc. Phys. Soc. London
74
,
233
243
(
1959
).
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