JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN
Online ISSN : 1349-838X
Print ISSN : 0019-2341
ISSN-L : 0019-2341
A method for calculation of the illuminance within the shadow
in the case of a sphere as a shadow caster under a square light source
Yoshihiko Ohtani
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1986 Volume 70 Issue Appendix Pages 53

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