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Look here, I have succeeded at last in fetching some gold from the sun.

— Gustav Kirchhoff

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Notes from Wikiquote

A memoir of Gustav Robert Kirchhoff, by Robert Von Helmholtz, translated by Joseph De Perott, in Annual Report of the Board of Regents of the Smithsonian Institution, Smithsonian Institution (1890), p. 537.

More quotes by Gustav Kirchhoff

The quantity E is called the emissive power of the body.

On the Relation Between the Emmisive and Absorbtive Power (1882)

All heat rays follow the same laws in their propagation, which are known for light rays.

On the Relation Between the Emmisive and Absorbtive Power (1882)

Under these conditions the following law holds : The ratio between the emissive and the absorptive power is the same for all bodies at the same temperature.

On the Relation Between the Emmisive and Absorbtive Power (1882)

Heat rays have the same nature as light rays... The invisible heat rays are distinguished from light rays only by the period of vibration or the wave length.

On the Relation Between the Emmisive and Absorbtive Power (1882)

[R]adiation in empty space will be investigated..⇒ the [associated] black bodies must have a refracted index which differs infinitely little from 1.

On the Relation Between the Emmisive and Absorbtive Power (1882)

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Attribution

Quote text and notes from Wikiquote: Gustav Kirchhoff (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.