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Objective:
To examine the inverse square law for light emitted by the real
sources.
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Wilhelm Wien (1864-1928),
German physicist who received the Nobel Prize for Physics in
1911 for his work on heat radiation. He formulated the
displacement law of blackbody radiation spectra at different
temperatures. It led to new techniques for illumination and
the measurement of high temperatures. His studies on
electrical discharges, nature of cathode rays, canal rays and
their behaviour in magnetic and electric fields gave basis for
later development of mass spectrography. Wien's work
contributed to the transition from Newtonian to quantum
physics; to the quantum theory of radiation in particular.
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