Photon-photon polaritons: Binding two photons of different colours together – Tech Explorist

The concept of momentum and energy (and therefore mass) is easy for most people, especially when it comes to solid objects. Most of them are not aware that non-material objects, such as light waves, also have mass.
Well, this is not an unknown fact for physicists. The idea that waves have a mass falls in the category where physics and the physical world come together.
In 1924, French physicist Louis de Broglie proposed wave-particle duality that describes how every particle or quantum entity can…

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