Quotessence
Home / Quotes / Quote by Gustav Kirchhoff

Quote by Gustav Kirchhoff

“Look here, I have succeeded at last in fetching some gold from the sun. {After his banker questioned the value of investigating gold in the Fraunhofer lines of the sun and Kirchhoff handing him over a medal he was awarded for his investigations.}”

Quote by Gustav Kirchhoff

Create image

Author

Gustav Kirchhoff

Browse famous quotes and profile details for Gustav Kirchhoff. more

You May Also Like

“That all plants immediately and substantially stem from the element water alone I have learnt from the following experiment. I took an earthern vessel in which I placed two hundred pounds of earth dried in an oven, and watered with rain water. I planted in it a willow tree weighing five pounds. Five years later it had developed a tree weighing one hundred and sixty-nine pounds and about three ounces. Nothing but rain (or distilled water) had been added. The large vessel was placed in earth and covered by an iron lid with a tin-surface that was pierced with many holes. I have not weighed the leaves that came off in the four autumn seasons. Finally I dried the earth in the vessel again and found the same two hundred pounds of it diminished by about two ounces. Hence one hundred and sixty-four pounds of wood, bark and roots had come up from water alone. (1648) [A diligent experiment that was quantitatively correct only as far as it goes. He overlooked the essential role of air and photosynthesis in the growth process]”

LightEarthScienceEnergySunBiologyPlantsExperimentPhotosynthesis
Author:Jan Baptist van Helmont
Create image

“[Concerning] phosphorescent bodies, and in particular to uranium salts whose phosphorescence has a very brief duration. With the double sulfate of uranium and potassium ... I was able to perform the following experiment: One wraps a Lumière photographic plate with a bromide emulsion in two sheets of very thick black paper, such that the plate does not become clouded upon being exposed to the sun for a day. One places on the sheet of paper, on the outside, a slab of the phosphorescent substance, and one exposes the whole to the sun for several hours. When one then develops the photographic plate, one recognizes that the silhouette of the phosphorescent substance appears in black on the negative. If one places between the phosphorescent substance and the paper a piece of money or a metal screen pierced with a cut-out design, one sees the image of these objects appear on the negative. One can repeat the same experiments placing a thin pane of glass between the phosphorescent substance and the paper, which excludes the possibility of chemical action due to vapors which might emanate from the substance when heated by the sun's rays. One must conclude from these experiments that the phosphorescent substance in question emits rays which pass through the opaque paper and reduces silver salts. [Although the sun is irrelevant, and he misinterprets the role of phosphorescence, he has discovered the effect of radioactivity.]”

ScienceSunPhysicsNobel PrizeNobel LaureateRadioactivityDiscovery Of Radioactivity
Author:Antoine Henri Becquerel
Create image

“I'd discovered that the sun equated happiness. Its bright and lovely existence was hope incarnate. It exposed the dark, brought forth the light and showed you that no matter how strong or oppressive the night was, that it was infinitely stronger, exponentially more substantial and just because you couldn't see it with your eyes, didn't mean it wasn't still with you. it was stalwart and constant. It was infinite.”

InspirationalSunStrengthInfiniteConstant
Author:Fisher Amelie
Create image