[Coral-List] Far red light

Richard Dunne RichardPDunne at aol.com
Thu May 31 11:31:34 EDT 2007

Far red is typically 720nm and above

You could use a Schott Glass  RG 715 longpass filter (they are not 
expensive). Schott are a German company but have worldwide distributors.

Richard P Dunne

West Briscoe, Baldersdale, Barnard Castle, Co Durham, DL12 9UP. UK
Tel +44 1833 650059

sdalton at nmsc.edu.au wrote:
> Hi I am trying to establish the wavelength of far red light, which is
> used to oxidise the accepter side of PSII.  If anyone can help with
> identifying this and if possible recommend a filter type and a supplier
> that would be great. I have a darkroom filter holder which has an Ilford
> 915 filter housed but the absorption curve for this filter indicates
> that it allows wavelengths of over 600nm - 700nm+ through.  I don't
> think that this filter is appropriate because chl a absorbs wavelengths
> between 650 - 700nm.  Any advice would be great. 
> Cheers
> Steve

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