Challenge has finished
A publisher needs an image suitable for the cover of a high school chemistry book. The client imagines beakers and test-tubes but is equally interested in images of elements and compounds. The most important consideration is that the book not be confused with physics, biology or geology.
Wednesday, 4th September, 2013 (GMT)
Wednesday, 11th September, 2013 – Tuesday, 17th September, 2013 (GMT)
Wednesday, 18th September, 2013 – Tuesday, 24th September, 2013 (GMT)
Capture date rules:
Maximum number of entries per user:
Maximum number of entries in challenge:
A litium salt (on the tip of an inert rod) heated on a flame, emmits a bright red light, the so-called "Lithium line" in flame spectrosopy.
|Submitted:||Sunday, 15th September, 2013 22:29 (GMT)|
|Taken:||Saturday, 8th August, 2009|
|Focal length:||60 mm|
|Shutter speed:||1/2 sec|
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