A colored line on an optical disk
4
Issued Date
2025-10-01
Resource Type
ISSN
00029505
eISSN
19432909
Scopus ID
2-s2.0-105016689016
Journal Title
American Journal of Physics
Volume
93
Issue
10
Start Page
775
End Page
780
Rights Holder(s)
SCOPUS
Bibliographic Citation
American Journal of Physics Vol.93 No.10 (2025) , 775-780
Suggested Citation
Kanchanapusakit W. A colored line on an optical disk. American Journal of Physics Vol.93 No.10 (2025) , 775-780. 780. doi:10.1119/5.0211333 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/112318
Title
A colored line on an optical disk
Author(s)
Corresponding Author(s)
Other Contributor(s)
Abstract
Editor's Note: When you hold a CD or a DVD under a lamp, you may sometimes see a colored line caused by the interference of light rays dispersed by the disk's grooves. This paper investigates why, when the lamp is sufficiently close to the disk, the colored line is not of a single color but instead exhibits a gradation of colors. This article could be useful as a classroom demonstration in undergraduate optics courses or as a puzzle one could ask students to solve.