More Eclipse Information…   Leave a comment

From the previous post, you know the date and time of the solar eclipse… so you just need to look up right? NO!!

You have to be safe!  The ultraviolet rays from the Sun can cause permanent injury to your eyes. You should never stare directly into the Sun. That’s my safety PSA for the day.

So now, how do you safely view the eclipse? You can watch it directly with eye protection, or watch a projection of it on something. Let’s look at them in turn.

Protection: You can use specially made eclipse glasses, solar filters from telescopes or binoculars, or eclipse viewing filters. I wouldn’t use anything else.  Some people use welders glass or film negatives but it is not safe.  But hey, it’s your eyes.

Projection:  The cheapest, easiest way to view the eclipse is  to make a ‘pinhole projector’. Simply take two pieces of cardboard or paper and use a pinhole in one to project the image of the Sun onto the other. You will still see the effect of the Sun with a “cut out” image on the viewing side.

Here’s two web sites for more information:

A good longish video about how to view it safely (7 minutes):

http://www.youtube.com/watch?v=eVi6rHQ-RLg

General sun safety page:

http://www.timeanddate.com/eclipse/eclipse-tips-safety.html

Remember:

In San Francisco, the eclipse will begin at 5:16 p.m. PDT. The maximum eclipse will occur at 6:32 p.m. when 84.22 percent of the sun will be obscured. The eclipse will end at 7:40 p.m.

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Posted 14 May, 2012 by tjsummer in Uncategorized

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