Scientists tackle 150-year-old mystery about the nature of light-matter interactions, and were able to measure the force that light exerts on matter. The results confirm that light possesses momentum, an idea first proposed by Johannes Kepler in 1619.

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Scientists tackle 150-year-old mystery about the nature of light-matter interactions, and were able to measure the force that light exerts on matter. The results confirm that light possesses momentum, an idea first proposed by Johannes Kepler in 1619.