Re: [Phys-L] Infrared

[bernard cleyet <bernardcleyet@redshift.com>]

Broken link, so I’ll just guess  that —   this is an absorption band, so   the background is the source and the methane blocks it, so it’s an area that looks black instead of bright.  It’s just like dental x-rays and metal restoration, or an impland screw w/ a metal crown.  


bc   who first X-rayed his mechanical pencil 1954.  
 
> On 2019/Dec/18, at 13:16, Forinash III, Kyle via Phys-l <phys-l@mail.phys-l.org> wrote:
>
> I’m a bit confused by the following New York Times article. They claim to be detecting methane leaks using IR cameras in the 3.2 to 3.4 Micrometer range. Wouldn’t such an image be overwhelmed by thermal IR? In other words the pictures are of heat, not methane specifically?
>
> https://www.nytimes.com/2019/12/13/reader-center/methane-infrared-camera.html<https://www.nytimes.com/2019/12/13/reader-center/methane-infrared-camera.html?te=1&nl=climate-fwd:&emc=edit_clim_20191218?campaign_id=54&instance_id=14640&segment_id=19701&user_id=f3315a4f40ddaa91b46edcfed5881d14&regi_id=8509815120191218>
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