Crystals and Light

March 1st (Tuesday), 6 p.m., Via Zoom (online) & (depending on Covid) Live at St. John’s Episcopal Church- Open to Public.
Presentation: “Crystals & Light”
Presented by John Guslander, Geologists of JH

Laboratories are filled with light, often in curious colors and patterns but until recently you had to go to the laboratory and peer into an instrument to see these phenomena. Now with the advent of digital journals and cameras, it is possible for us to see the same thing that researchers see. One of the most common images in a geology journal is a thin section. Minerals are sliced thin enough to allow the transmission of visible light and then they are examined under cross polarized light. We will take a tour of this process starting with some general light behavior in nature. First we will look at halos and pillars caused by light interacting with crystals in the air. Next we will move on to polarization. Mineral crystals are often asymmetric and their interaction with polarized light produces striking images that can be used to tell stories about what a rock is and how it came to be in its current state. Examples of this will be demonstrated in the lecture using simple technology.

Topic: Crystals & Light
Time: Mar 1, 2022 06:00 PM Mountain Time (US and Canada)

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Meeting ID: 455 565 1818
Passcode: 576063
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