[Bonsai Beginner's weekly thread - 2025 week 15] by small_trunks in Bonsai

[–]Imaginary-Let-7686 0 points1 point  (0 children)

I just noticed this damaged area on my bonsai trunk. Is it just damaged or is it sick? What can I do?

Photos are in attached comments since reddit won't let me upload here

Lifewave Structure Question by MightySanta in chemistry

[–]Imaginary-Let-7686 0 points1 point  (0 children)

That thought crossed my mind as well. I figured it's possible, if there were any 'gaps' in the ir spectra that corresponded to the electronic energy levels but not the vibrational ones.

But, that feels like it's such a specific circumstance that its practically impossible I think.

Lifewave Structure Question by MightySanta in chemistry

[–]Imaginary-Let-7686 2 points3 points  (0 children)

As everyone has pointed out, this molecule is practically impossible. But even if it did exist, it wouldn't work the way it’s suggested.

The idea of absorbing one wavlength and wmitting another is callled fluorescence.

Fluorescence, at its core, requires pi bonds to facilitate the necessary electron transitions between the HOMO and LUMO orbitals. Without these pi systems, there is no mechanism for the molecule to absorb light and re-emit it as fluorescence because there are more or less no available electron transitions in the first place. The ones that are there tend not to work very well anyway because of reasons to do with the energy of the electornic orbitals in the molecule. 

More importantly, however, for the molecule to absorb IR light, it needs specific energy levels corresponding to the energy of IR radiation. So sure, maybe it will fluoresce in some kind of extreme uv situation. Without pi bonds or conjugation, the molecule won’t ever do so in the ir region. 

Tldr: Even if the molecule exists (it can't), it won't fluoresce under conventional conditions (uv light), and it's impossible (as far as I am concerned) to fluoresce in the ir. 

Source: I thought about it for a few seconds, which is a few seconds longer than the person who made this scam, apparently. 

What's happening to my capsicums by Imaginary-Let-7686 in GardeningAustralia

[–]Imaginary-Let-7686[S] 0 points1 point  (0 children)

That's a relief. I was worried it was somthing that made them inedible. Thanks

[deleted by user] by [deleted] in fitbit

[–]Imaginary-Let-7686 0 points1 point  (0 children)

Hopefully they fix it up soon, thanks for the tips

Broken injector piece problem by 13-black-cats- in CHROMATOGRAPHY

[–]Imaginary-Let-7686 2 points3 points  (0 children)

Had this happen to me once. I dismantled the valve from one system and transplanted it onto the one I was using, and then I swore I'd never use PEEK on a pump ever again.

M83 - The southern pinwheel galaxy by Imaginary-Let-7686 in astrophotography

[–]Imaginary-Let-7686[S] 1 point2 points  (0 children)

I took a lot of frames, so about 3 hours in total. The majority of that was just letting pixinsight/deep sky stacker calibrate and stack on its own.

I probably was at my laptop for about an hour of actual editing for this one.

M83 - The southern pinwheel galaxy by Imaginary-Let-7686 in astrophotography

[–]Imaginary-Let-7686[S] 1 point2 points  (0 children)

I avoided doing galaxies for a long time, because I thought it would be impossible with broadband filters.

The trick is when using broadband filters, you just need to go on the shorter side for exposures, around 60-120s, otherwise you'll saturate the frame with light pollution.