Partial Solar Eclipse Thursday Evening

October 23, 2014 10:42 AM

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Partial Solar Eclipse Thursday Evening

1) Projection: The safest and most inexpensive way to watch a partial solar eclipse is by projection. Place a pinhole or small opening in a card, and hold it between the sun and a screen – giant sheet of white paper works – a few feet away. An image of the sun will be seen on the screen. Projected images of the sun's crescent during an eclipse may even be seen on the ground in the small openings created by interlacing fingers, or in the dappled sunlight beneath a leafy tree. You can also use binoculars to project a magnified image of the sun on a white card. However, you must never look through the binoculars at the sun.

2) Filters: The sun can be viewed directly only when using filters specifically designed for this purpose. Such filters usually have a thin layer of aluminum, chromium or silver deposited on their surfaces. One of the most widely available filters for safe eclipse viewing is a #14 (or darker) welder...

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