Bug 73930

Summary:	Error ( typo ) in documentation: kstars_blackbody.po: green should be yellow/green
Product:	[Applications] kstars	Reporter:	Rinse De Vries <rinse>
Component:	general	Assignee:	kstars
Status:	RESOLVED NOT A BUG
Severity:	normal
Priority:	NOR
Version:	unspecified
Target Milestone:	---
Platform:	unspecified
OS:	Linux
Latest Commit:		Version Fixed In:

Description Rinse De Vries 2004-02-01 00:47:01 UTC

Version:           1.0 (using KDE 3.2.0 RC1, SuSE)
Compiler:          gcc version 3.3.1 (SuSE Linux)
OS:          Linux (i686) release 2.4.21-166-athlon

Hi string # 16 in kstars_blackbody.po contains an error:

This wavelengths falls in the green region of the visible light 
spectrum, but the sun's continuum radiates photons both longer and 
shorter than lambda(max) and the human eyes perceives the sun's 
color as yellow/white.

-> Green region should be Yellow/Green region. It makes a hughe difference, there should be yellow in the color since our eyes are more sensitive for yellow as a (not complete) adjustement to the color of the strongest sunlight.

Comment 1 kstars 2004-02-01 01:20:54 UTC

Subject: Re:  New: Error ( typo ) in documentation: kstars_blackbody.po: green should be yellow/green

On Saturday 31 January 2004 04:47 pm, Rinse De Vries wrote:
> Hi string # 16 in kstars_blackbody.po contains an error:
>
> This wavelengths falls in the green region of the visible light
> spectrum, but the sun's continuum radiates photons both longer and
> shorter than lambda(max) and the human eyes perceives the sun's
> color as yellow/white.
>
> -> Green region should be Yellow/Green region. It makes a hughe difference,
> there should be yellow in the color since our eyes are more sensitive for
> yellow as a (not complete) adjustement to the color of the strongest
> sunlight.

lambda_max for the sun is about 5012 Angstroms.  This is Blue-Green, not 
Yellow-Green.  See the following:

"Human daylight vision is most effective in the blue-green (around 550 nm) 
where the sun's energy spectrum is in the region of its maximum.":
http://acept.la.asu.edu/PiN/rdg/color/source.shtml

"The sun emits most of its light in the visible part of the spectrum, peaking 
in the blue-green, just the the right wavelengths for photosynthesis by green 
plants.":
http://www.soc.soton.ac.uk/JRD/SCHOOL/mt/mt001a_1.html

Images:
http://antwrp.gsfc.nasa.gov/apod/ap000815.html
http://hyperphysics.phy-astr.gsu.edu/hbase/bkg3k.html
http://www.mp-docker.demon.co.uk/environmental_chemistry/topic_1a/emission_spectrum_text.html

Jason

Comment 2 kstars 2004-02-01 17:57:09 UTC

See my previous comments for the argument against this change.  The bug reporter now agrees, so I'm marking this invalid.