Technology
Single particles of light can be used for remote 3D surveillance
Researchers have taken 3D images by bouncing individual photons from a laser off a building 45 kilometres away, more than 4 times farther than ever before
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Researchers have taken 3D images by bouncing individual photons from a laser off a building 45 kilometres away, more than 4 times farther than ever before
The beautiful iridescence of bubbles is captured in this image – shortlisted for a prize – as light reflects and refracts as it passes through bubble walls