Definitions from Wiktionary (light echo)
▸ noun: (astronomy) A phenomenon caused by light reflected off surfaces distant from the source, and arriving at the observer with a delay relative to this distance, analogous to an echo of sound.
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▸ noun: (astronomy) A phenomenon caused by light reflected off surfaces distant from the source, and arriving at the observer with a delay relative to this distance, analogous to an echo of sound.
Similar:
photo echo,
light equation,
echoreflectance,
echo time,
light eon,
reflection,
sporadic E,
lightspeed lag,
lightclock,
lite,
more...
Opposite:
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▸ Invented words related to light echo