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Physics

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    $\begingroup$ You might want to look at a zone plate. $\endgroup$ Commented Jun 23, 2019 at 18:35
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    $\begingroup$ You might want to take a look at holography. $\endgroup$ Commented Jun 24, 2019 at 3:33
  • $\begingroup$ Another term for this (in addition to the ones in the answers) is "color mixing", which happens in some severe thunderstorms where red and blue light mix and create green light. $\endgroup$ Commented Jun 24, 2019 at 18:03
  • $\begingroup$ Liked chirped pulse amplification - en.wikipedia.org/wiki/Chirped_pulse_amplification? $\endgroup$ Commented Jun 24, 2019 at 19:36