Dear SnackTalk:
In the online activity, "Reflections of a Star - How to Find the
[Apparent] Angular Diameter of the Sun," the Sun's image is reflected from
a mirror through a bottle of water onto a white projection screen. The
idea seems simple enough, although there is no mention of the purpose of
the bottle of water--why not simply reflect the Sun's image directly onto
a projection screen? Enquiring minds want to know!
Sunny Days & Starry Nights!
Walter Sanford, Planetarium Teacher
Sandburg Planetarium
E-mail: wsanford@wsanford.com
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Walter Sanford, Director Carl Sandburg Middle School
Center for Sky Awareness 8428 Fort Hunt Road
Sandburg Planetarium Alexandria, VA 22308
Fairfax County Public Schools Work (voice): 703-799-6169
E-mail: wsanford@wsanford.com Home (voice/fax): 703-765-9392
AMS Project ATMOSPHERE Atmospheric Education Resource Agent
SCSA, Geosystems, & Camp T-Equity - URL: http://www.wsanford.com/
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