NotesFAQContact Us
Search Tips
Peer reviewed Peer reviewed
Direct linkDirect link
ERIC Number: EJ1077411
Record Type: Journal
Publication Date: 2015-Jun
Pages: 2
Abstractor: ERIC
ISSN: ISSN-1449-6313
Try This: Jelly Optical Fibre
Kellett, Sarah
Teaching Science, v61 n2 p12-13 Jun 2015
As part of the celebration of the international year of light and light-based technologies, this article presents an activity involving boiling water, sharp knives, gelatin powder, and a laser pointer. Students are instructed never look directly at a laser pointer because it can damage the eyes, and to make sure a responsible adult is present at all times. A list of supplies is provided and directions are included for producing a jelly optical fibre. The light is effectively trapped inside the jelly, allowing it to bend it and bounce it back and forth. The purpose of this exercise is to demonstrate the principal of total internal reflection of light. Light is trapped inside the jelly allowing it to be bent and bounce back and forth. A similar application of light bending is used by doctors in endoscopes to shine light inside the body for better visualization of organs and tissue for diagnostic, and treatment purposes. [This article first appeared in "The Helix" magazine, Issue 152.]
Australian Science Teachers Association. P.O. Box 334, Deakin West, ACT 2600, Australia. Tel: +61-02-6282-9377; Fax: +61-02-6282-9477; 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