“Every instrument that has been designed to be sensitive enough to detect weak light has always ended up discovering that the same thing: light is made of particles.”

Source: QED: The Strange Theory of Light and Matter (1985), p. 15

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Do you have more details about the quote "Every instrument that has been designed to be sensitive enough to detect weak light has always ended up discovering tha…" by Richard Feynman?
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Richard Feynman 181
American theoretical physicist 1918–1988

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