The Thin Border between Light and Shadow

We propose a simple, direct estimate of the Sun's diameter based on penumbra observation and measurement in a two-level approach, the first for middle-school pupils and making use of simple geometrical arguments, the second more appropriate to high-school students and based on a slightly more s...

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Bibliographic Details
Published in:	Physics education Vol. 45; no. 4; pp. 378 - 381
Main Authors:	Guglielmino, M, Gratton, L. M, Oss, S
Format:	Journal Article
Language:	English
Published:	Institute of Physics Publishing 01-07-2010
Subjects:	Computation Geometric Concepts High School Students Light Measurement Techniques Middle School Students Observation Photography Science Instruction Secondary School Science
Online Access:	Get more information
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Summary:	We propose a simple, direct estimate of the Sun's diameter based on penumbra observation and measurement in a two-level approach, the first for middle-school pupils and making use of simple geometrical arguments, the second more appropriate to high-school students and based on a slightly more sophisticated approach. (Contains 5 figures.)
ISSN:	0031-9120
DOI:	10.1088/0031-9120/45/4/009