Conic Emission

Typical cone-shaped light emission taken when a piece of white paper is used to intercept sideways the transmitting light of the femtosecond laser that propagates from the right to the left and produces a micro air plasma ball (also shown on the right) in air. Olympus C5050Z. [Winner 2013 After Image photo contest.] —Zhijun Xu, Nankai University

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