A light echo is a phenomenon observed in astronomy. Analogous to an echo of sound, a light echo is produced when a sudden flash or burst of light, such as that observed in novae, is reflected off a source and arrives at the viewer some time after the initial flash. Because of their geometries, light echoes can produce the illusion of superluminal speeds.
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Famous quotes containing the words light and/or echo:
“Let me give light, but let me not be light,
For a light wife doth make a heavy husband.”
—William Shakespeare (1564–1616)
“Whenever we encounter the Infinite in man, however imperfectly understood, we treat it with respect. Whether in the synagogue, the mosque, the pagoda, or the wigwam, there is a hideous aspect which we execrate and a sublime aspect which we venerate. So great a subject for spiritual contemplation, such measureless dreaming—the echo of God on the human wall!”
—Victor Hugo (1802–1885)