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ERIC Number: EJ1155525
Record Type: Journal
Publication Date: 2017-Oct
Pages: 3
Abstractor: As Provided
ISSN: ISSN-0031-921X
Use of Linear and Circular Polarization: The Secret LCD Screen and 3D Cinema
Richtberg, Stefan; Girwidz, Raimund
Physics Teacher, v55 n7 p406-408 Oct 2017
References to everyday life are important for teaching physics. Discussing polarization phenomena, liquid crystal displays (LCDs) and 3D cinemas provide such references. In this paper we describe experiments to support students' understanding of linearly polarized light as well as the phenomenon of inverted colors using a secret LCD screen. Moreover we explain how 3D glasses work (when using polarizers) and introduce some experiments to point out why 3D cinemas use circularly polarized light instead of linearly polarized light. When using linearly polarized light, viewers must keep their head level all the time. Using circularly polarized light, this is not necessary.
American Association of Physics Teachers. One Physics Ellipse, College Park, MD 20740. Tel: 301-209-3300; Fax: 301-209-0845; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A