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Photograph Captures Light as both a Particle and a Wave

For 110 years, the scientific community has understood that light behaves as both a particle and a wave. Einstein won a Nobel Prize for this theory, and experiments have since confirmed light is a both a wave and a particle. However, until recently light’s dual characteristics had never been observed simultaneously.

In a breakthrough, researchers at the École Polytechnique Fédérale de Lausanne (EPFL) in Sweden have captured a photograph of light acting as both a wave and a particle. In order to catch light in the act, the EPFL team took advantage of the way that electrons interact with light.

They fired a pulse of laser light at a metallic nanowire, which added energy to the charged particles in the wire and caused them to vibrate, trapping the light there as a standing wave. Then they shot a stream of electrons just past the wire holding the trapped light. The electrons then hit the photons and change speed. Using an ultrafast energy-filtered transmission electron microscope – one of the two in the worldthe researchers were able to pinpoint the location of the exchange of energy and take a photo. The image shows light acting simultaneously as both a wave and a particle and demonstrates for the first time ever that we can film quantum mechanics directly, which could have future applications in quantum computing.

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How To Work Safely with High‑Voltage Test & Measurement Equipment

This white paper describes an alternative approach to calibrating high-voltage systems and provides meter and probe safety considerations and general guidance for safely operating high-voltage equipment.

The details of the experiment are freely available in a paper that published on March 2 in Nature Communications.

Source: CNET | EPFL

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