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 A scientist captured an impossible photo of a single atom

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CANNER
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PostSubject: A scientist captured an impossible photo of a single atom   A scientist captured an impossible photo of a single atom I_icon_minitimeWed Aug 22, 2018 10:54 am

A scientist captured an impossible photo of a single atom

Quote :
A student at the University of Oxford is being celebrated in the world of science photography for capturing a single, floating atom with an ordinary camera.
Using long exposure, PhD candidate David Nadlinger took a photo of a glowing atom in an intricate web of laboratory machinery. In it, the single strontium atom is illuminated by a laser while suspended in the air by two electrodes. For a sense of scale, those two electrodes on each side of the tiny dot are only two millimeters apart.

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CANNER
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PostSubject: Re: A scientist captured an impossible photo of a single atom   A scientist captured an impossible photo of a single atom I_icon_minitimeWed Aug 22, 2018 8:06 pm

Somebody should give that man a highspeed 10000 frames per second 8k camera.. Surprised
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PostSubject: Re: A scientist captured an impossible photo of a single atom   A scientist captured an impossible photo of a single atom I_icon_minitimeThu Aug 23, 2018 7:49 am

Just looks too big hmmz..if those electrodes on each side are made up of millions
of atoms...how can one atom be so large ?
I dunno.. A scientist captured an impossible photo of a single atom 984587

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PostSubject: Re: A scientist captured an impossible photo of a single atom   A scientist captured an impossible photo of a single atom I_icon_minitimeThu Aug 23, 2018 12:07 pm

This article explains how it's done:

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To be clear, Nadlinger said, the purple speck at the center of this photo is not the true size of the strontium atom itself; it's the light from an array of surrounding lasers being re-emitted by the atom. When bathed in a specific wavelength of blue light, strontium creates a glow hundreds of times wider than the radius of the atom itself (which is about a quarter of a nanometer, or 2.5x10 to the -7 meters, Nadlinger said). This glow would be barely perceptible with the naked eye but becomes apparent with a little camera manipulation.


and then they used this camera trick:


Quote :
"The apparent size you see in the picture is what we'd call optical aberration," Nadlinger said. "The lens we're seeing it through is not perfect — also it's slightly out of focus and slightly overexposed. You could compare it to looking at the stars in the night sky, which appear bright but are actually much, much smaller than the size they seem to be, just because our eyes (or the camera) don't have enough resolution to process them."


Sometimes when photographing at night and you want some stars in the background, it is better to have them just out of focus.
That way they show up bigger on the photo. If you focus directly on the stars, they become too small to be visible on the photo.
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PostSubject: Re: A scientist captured an impossible photo of a single atom   A scientist captured an impossible photo of a single atom I_icon_minitimeFri Aug 24, 2018 7:08 am

Ahh...now it makes sense  A scientist captured an impossible photo of a single atom 2179795567

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PostSubject: Re: A scientist captured an impossible photo of a single atom   A scientist captured an impossible photo of a single atom I_icon_minitime

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