Quantum erasing experiment

The exhibits consist of a booth, a quantum erasing experimental device, a 43 inch LCD TV, a graphic and text version, and two buttons. When unmanned, the LCD TV plays a video introducing the principle of wave particle duality in a loop. visitors comes to the device and presses the "wave" button to watch the wave imaging of light in the demonstration device; Press the "Particle" button to view the particle imaging of light in the demonstration device.

The unit is designed for unsupervised public use: controls are recessed or shielded, moving parts are enclosed, and the interface is operable by a child of about six with no instruction. Where a screen is used, the language can be switched without changing the hardware, and the content can be replaced on site.

In 1807, Thomas Young first described his double slit experiment: placing a candle in front of a piece of paper with a small hole open, thus forming a point light source (a light source emitted from a point). Now put another piece of paper behind it, the difference is that there are two parallel slits on the second piece of paper. The light emitted from the small hole passes through two narrow slits and is projected onto the screen, forming a series of alternating bright and dark fringes, which are now known as double slit interference fringes. A seemingly simple experiment revealed an astonishing phenomenon: light does not propagate in a straight line, it has wave like properties, which is vastly different from the popular theory of light particles that has been popular for centuries.