Description

Overview:

In this optics activity, learners examine how polarized light can reveal stress patterns in clear plastic. Learners place a fork between two pieces of polarizing material and induce stress by squeezing the tines together. Learners will observe the colored stress pattern in the image of the plastic that is projected onto a screen using an overhead projector. Learners rotate one of the polarizing filters to explore which orientations give the most dramatic color effects. This activity can be related to bones, as bones develop stress patterns from the loads imposed upon them every day.

Subject:

Physics

Level:

Upper Primary, Middle School, High School

Material Type:

Activity/Lab

Provider:

Exploratorium

Provider Set:

Science Snacks

Date Added:

12/01/2012