August 13, 2009
Alvin and the chipmunks?
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Cracked by: duriel , Rohan , udupendra , shrik , Dibyo , Debasish , dheeraj , Rogi , AmK , Logik , Raghuvansh , varuns88.
Answer:
Quoting shrik
1. Pierre Janssen
2. The clear yellow line is at 587.49nm in the spectrum
3. Guntur :p
Janssen noticed this wavelength while watching a total solar ecipse in Guntur, which led him to discover Helium.
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August 13th, 2009 at 10:26 pm, GMT +0000 ( 1250202411 )
Pierre Janssen-> Guntur-> Helium Discovery
August 13th, 2009 at 10:36 pm, GMT +0000 ( 1250203018 )
Pierre Janssen
August 13th, 2009 at 11:08 pm, GMT +0000 ( 1250204915 )
Pierre Jansen discovered Helium using spectroscopic techniques, during the great solar eclipse of 1868 – he did this at the Andhra town of Guntur, munching on red chillies.
August 13th, 2009 at 11:56 pm, GMT +0000 ( 1250207806 )
1. Pierre Janssen
2. The clear yellow line is at 587.49nm in the spectrum
3. Guntur :p
Janssen noticed this wavelength while watching a total solar ecipse in Guntur, which led him to discover Helium.
Lockyer did similar stuff later in the year, but not in Guntur :)
August 14th, 2009 at 1:05 am, GMT +0000 ( 1250211915 )
Guntur is situated at a crucial longitude for synoptic coverage of solar phenomena. It was on August 18, 1868 in the tobacco fields of Guntur that the French astronomer, Pierre-Jules-Cisar Janssen (1824-1907), stumbled upon a yellow line in the solar spectrum while observing a solar eclipse. He christened it `Heliose’, from the Greek word helios, which means sun.
August 14th, 2009 at 1:31 am, GMT +0000 ( 1250213501 )
Helium
Pierre Janssen
Helium – Helium was first detected in the Sun due to its characteristic spectral lines
Pierre Janssen first discovered helium while observing a solar eclipse while at Guntur
http://www.thehindu.com/thehin.....19201g.htm
August 14th, 2009 at 5:48 am, GMT +0000 ( 1250228894 )
Pierre Jules César Janssen discovered Helium by
observing the total solar eclipse[August 18, 1868] from Guntur.
August 14th, 2009 at 7:25 am, GMT +0000 ( 1250234728 )
Helium
August 14th, 2009 at 8:17 am, GMT +0000 ( 1250237879 )
Pierre Jules César Janssen (1) discovered the existence of Helium (2) while watching a complete solar eclipse in Guntur (3) in 1868.
August 14th, 2009 at 9:38 am, GMT +0000 ( 1250242737 )
Pierre Jules César Janssen, a french astronomer, who discovered Helium in Guntur during the Great Indian Eclipse.
Helium Spectral line.
Connect is helium.
August 14th, 2009 at 12:40 pm, GMT +0000 ( 1250253648 )
Janssen, Spectral line which helped him discover Helium. In Gunturu.
August 14th, 2009 at 11:34 pm, GMT +0000 ( 1250292886 )
Discovery of Helium