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Estimating Avogadro's number from skylight and airlight

Peter Pesic

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Naked-eye determinations of the visual range yield order-of-magnitude estimates of Avogadro's number, using an argument of Rayleigh. Alternatively, by looking through a cardboard tube, we can compare airlight and skylight and give another estimate of this number using the law of atmospheres.


PACS

33.20.Fb Raman and Rayleigh spectra (including optical scattering)

Subjects

Atomic and molecular physics

Dates

Issue 1 (14 January 2005)

Received 13 August 2004, in final form 18 October 2004

Published 29 December 2004



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