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Fightboy Fightboy
wrote...
Posts: 29
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9 years ago
You set the spectrophotometer to 475 nm. You most likely are measuring the
absorbance of what color?


The answer was orange but i thought it was blue since blue wavelengths are in the 475 nm range. Can someone explain this to me??
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wrote...
#1
9 years ago
What makes you think it's orange? The visible blue light has a wavelength of about 475 nm. Because the blue wavelengths are shorter in the visible spectrum, they are scattered more efficiently by the molecules in the atmosphere. This causes the sky to appear blue.
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Fightboy Author
wrote...
#2
9 years ago
I don't that's what the test key said, I originally thought the answer is blue. So do you think the test key is wrong?
wrote...
#3
Valued Member
On Hiatus
9 years ago
Look:
http://www.google.gr/imgres?imgurl=http%3A%2F%2Fimg.brothersoft.com%2Fscreenshots%2Fsoftimage%2Fw%2Fwavelength-160945-1.jpeg&imgrefurl=http%3A%2F%2Fstackoverflow.com%2Fquestions%2F2155664%2Falgorithm-to-generate-wavelength-color-gradient-in-c-sharp&h=310&w=448&tbnid=ANqIYqcfZQ5LqM%3A&zoom=1&docid=kcomL3x7RzaNqM&ei=QEFFVLWlJcK_ygPbnICADw&tbm=isch&client=firefox-a&ved=0CCAQMygCMAI&iact=rc&uact=3&dur=353&page=1&start=0&ndsp=15
He probably confused wavelength with frequency or something. Whatever, the test key is probably wrong, and the answer should be as you said: blue. The keys sometimes have mistakes.
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