No, Steve in the UK is 'barkatfish'.  Anthony O'Connor or whoever persona he
is this week expropriated the name for whatever his own purposes are.

 

cm

 

From: owner-u...@colostate.edu [mailto:owner-u...@colostate.edu] On Behalf
Of Bill Hooper
Sent: Sunday, July 11, 2010 22:51
To: U.S. Metric Association
Subject: [USMA:48183] RE: Light bulbs

 

 

On  Jul 11 , at 9:19 AM, Anthony O'conner (also known as barkatfish)
wrote:





Kelvins are used to define the color of the light.  What about wavelength in
nanometres? 

 

 

Most lights (LED, CF as well as incandescent) give off ALL wavelengths of
light, therefore it would be impossible to describe the light as having any
one wavelength in nanometres.

 

The Kelvin unit is a temperature unit. On light bulbs, it describes the
distribution of all the wavelengths. The temperature refers to the
distribution of wavelengths in a hot, glowing material that is heated to
that temperature. It fits the incandescent bulb best because the
incandescent filament IS a hot, glowing material. I think the Kelvin
temperature equivalent for other types of bulbs must be some average
approximation.

 

Bill Hooper

71 kg body mass*

Fernandina Beach, Florida, USA

 

* finally down to my desired mass.

 





 

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