How strange! The sky is blue!Written by K.A.Cassimally
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You would however ask me why itís blue rays, which get scattered, and not indigo nor violet rays (the other colours pass through atmosphere remember Ė thereís also blue that pass through but it then gets scattered). Well in fact, shorter wavelength, more colour gets scattered. Violet, which has shortest wavelength of all colours of rainbow thus gets scattered more than blue rays do. Our eyes however are much more sensitive to blue than to violet and sky therefore doesnít appear to be violet but blue (in reality sky is violet-indigo!).
Now do take time making following: Take a look at horizon (if youíre at seaside) and note skyís colour there. No, itís not as blue as rest of sky, is it? Itís much paler. This is because for blue light to reach your eye, it has to travel more. Blue light will thus pass through more air consequently getting scattered more. Conclusion: less blue light reaches your eyes than compared to blue light from just above you.
K.A.Cassimally is the editor in chief of Astronomy Journal and Astronomy Journal Ezine. He is also the co-founder of the RCPL Astronomy Club. K.A.Cassimally is best known for his article 'Harry Potter and the Moons of Jupiter'. He is also Senior Columnist at BackWash.com where he writes 'Not Scientific Science'.
NABGG (Nat'l Assoc. of Black Geologists & Geophysicists) 23rd Annual Conference 9/15 Ė 9/18, 2004 - Austin, TexasWritten by Robert Johnson
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Technical Presentations, Career Fair, Tours, and Community Service Activities
In addition, many Texas state leaders are expected to attend this national convention. The convention promises to be an exciting one, so please begin planning to join us. We hope to see you in Austin!
About NABGG NABGG strives to increase minority representation in geosciences through partnerships with academia and by mentoring undergraduate as well as graduate students. We are committed to continuous training and development of aspiring and practicing geoscientists.
Visit NABGG online: www.nabgg.org
NABGG 4212 San Felipe, Suite 420 Houston, Texas 77027-2902 firstname.lastname@example.org
Vice President , NABGG