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Estimating Avogadro's number from skylight and airlight

Peter Pesic 2005 Eur. J. Phys. 26 183-187   doi: 10.1088/0143-0807/26/1/018  Help

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Peter Pesic
St John's College, 1160 Camino de la Cruz Blanca, Santa Fe, NM 87505-4599, USA

Abstract. 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.

Print publication: Issue 1 (14 January 2005)
Received 13 August 2004, in final form 18 October 2004
Published 29 December 2004

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