Friday, January 15, 2010

Solar Eclipse 2010: Watching the Sun through Negative Film, Welding Glasses and Filters


This method is often described in books and magazines, but is still dangerous for several reasons. Therefore read on carefully!

Many years ago, film plates used silver nitrate. An over-exposed film plate would thus provide an effective metallic shield, similar to the shields used by astronauts in space in front of their helmets.
Nowadays, however, most plastic films are made of other materials and do not give any protection against solar infrared rays.

Therefor we absolutely advise against the use of:

* over-exposed filmnegatives (black and white as well as color)
* X-Ray photosheets
* floppy disks
* CD's
* a piece of glass blackened by soot from a candle

P/S The maximum duration of the Solar eclipse 2010 would be 11 minutes and 8 seconds over the Indian Ocean. A gold ring instead of a diamond ring will be visible in the sky. In India the Solar Eclipse will start at around 11am and end around 3:15.

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