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This image may not be used in educational posters Double-slit experiment Computer illustration showing a plane wave (bottom right) passing through a gap in a screen, and the resultant circular wave then passing through a screen with two gaps. The gaps act as new wave sources and the wavefronts bend to create two sets of circular waves radiating outwards. These two new waves create an interference pattern as they interact. At the point where a wave peak from one hits a wave peak from another, or a trough hits a trough, they reinforce each other; their magnitudes are summed. This is known as constructive interference. Where a trough hits a peak or vice versa and they cancel each other out. This is known as destructive interference.

Can particles really be in two places at the same time?

11 July 2022

When talking about quantum physics, people will often nonchalantly say that particles can be in two places at once. Physicist Sabine Hossenfelder explores what is actually going on
Why CERN's plans for a €20 billion supersized collider are a bad idea

Why CERN's plans for a €20 billion supersized collider are a bad idea

17 January 2019

The research potential of a proposed massive particle smasher that would dwarf the Large Hadron Collider doesn’t justify its huge price tag, says Sabine Hossenfelder

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