THE PICTURE OF AN ATOM " WHITE DOT "

IF YOU LOOK CLOSELY, YOU CAN SEE A STRONTIUM ION IN THE CENTRE OF THIS ION TRAP ,BETWEEN THE TIPS OF THE TWO "NEEDLE "  ELECTRODES . THE TIPS OF THE NEEDLES ARE SEPARATED BY 2.3MM - ROUGHLY THE WIDTH OF A SPAGHETTI NOODLES
"The idea of being able to see a single atom with the naked eye had struck me as a wonderfully direct and visceral bridge between the miniscule quantum world and our macroscopic reality," he said in a press release. "A back-of-What When ions like this are illuminated by the right color of blue-violet laser, they absorb the light particles and emit them right back. Nadlinger realized that if he set up his camera with a long enough exposure, he might be able to capture this fleeting moment of light emission in a digital image. He placed his tripod so the lens peered through the window of the ultra-high vacuum chamber that houses the ion trap, which in turn suspends the atom, and took his shot.
the-envelope calculation showed the numbers to be on my side, and when I set off to the lab with camera and tripods one quiet Sunday afternoon, I was rewarded with this particular picture of a small, pale blue dot."

you're seeing is a single positively charged strontium atom (also known as a strontium ion) suspended in electric fields radiating from the metal electrodes around it. To get a sense of just how small this image is, the distance between the two needle-like tips you see is about 2 millimeters — roughly the width of a spaghetti noodle.