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Definition of Photo echo
1. Noun. (physics) a form of resonance sometimes observed as a coherent pulse of light after two similar pulses have traversed a medium ¹
¹ Source: wiktionary.com
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1. Noun. (physics) a form of resonance sometimes observed as a coherent pulse of light after two similar pulses have traversed a medium ¹
¹ Source: wiktionary.com