International Year of
Total Solar Eclipse July 22, 2009
TSE in India
Interactive Eclipse Map
Vidur Prakash, member of , Amateur Astronomers Association
Delhi, is pursuing a doctoral degree in Elect. engg. (quantum electronics)
from Michigan Tech, USA. has put up an interactive Eclipse Map. Please
Resources for Eclipse Goggles
(in order the information received by us)
Two possible observational exercises
These are quick suggestion without any introduction or preface. If there are any questions one may please us directly. We will answer those questions on these pages. With the advent of modern digital cameras one can think of two observational exercises those amateur astronomers could try.
The Shadow Bands
The phenomena that takes place just before and after the totality (Check these links , Shadow bands during a total solar eclipse by Dr. Wolfgang Strickling ).
One could use their simple digital camera in the movie mode to try and capture the shadow bands. Let the time be superimposed on the frames. In addition to the method suggested by Dr Wolfgang Strickling one might draw equidistant parallel line on the sheet spread on the ground. Try and keep the camera normal to the sheet.
The Flash Spectrum
One needs to be rather quick to record the flash spectrum (the spectrum of chromosphere) and thus the phenomenon may best be recorded in movie mode. DVDs with their printed layers peeled away make good cheap diffraction gratings. Put one in front of the camera lens. You can now see the spectrum of any source and can therefore record it too. Make the attachment in such a way that the grating can be rotated easily .
To record the flash spectrum, close to the totality phase when only a thin crescent of the Sun is seen in the sky rotate the grating in such a way that the spectrum is normal to the crescent sun. Let the camera roll. First you should have a broad continues spectrum soon you might see some absorption lines and when the photosphere is gone and only chromosphere is left you should be able to see the bright emission lines - the flash spectrum.
This picture above is the spectrum of the Moon taken using a CD as diffraction grating
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