Flicker from the dark: Reading between the lines to model our galaxy's central black hole

Flicker from the dark: Reading between the lines to model our galaxy's central black hole
Looks can be deceiving. The light from an incandescent bulb seems steady, but it flickers 120 times per second. Because the brain only perceives an average of the information it receives, this flickering is blurred and the perception of constant illumination is a mere illusion.
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