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- The photoelectric effect was discovered in 1887 by the German physicist Heinrich Rudolf Hertz. In connection with work on radio waves, Hertz observed that, when ultraviolet light shines on two metal electrodes with a voltage applied across them, the light changes the voltage at which sparking takes place.
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Apr 12, 2024 · The photoelectric effect was discovered in 1887 by the German physicist Heinrich Rudolf Hertz. In connection with work on radio waves, Hertz observed that, when ultraviolet light shines on two metal electrodes with a voltage applied across them, the light changes the voltage at which sparking takes place.
- The Editors of Encyclopaedia Britannica
In 1887, Heinrich Hertz observed the photoelectric effect and reported on the production and reception of electromagnetic waves. The receiver in his apparatus consisted of a coil with a spark gap , where a spark would be seen upon detection of electromagnetic waves.
The photoelectric effect was first observed by German physicist Heinrich Hertz in 1887 . Hertz noticed that when certain frequencies of light were shone on a metal, the metal would sometimes exhibit a spark. Later, J.J. Thomson identified these sparks as light-excited electrons leaving the surface of the metal.
Heinrich Hertz made perhaps the earliest recorded observation of the photoelectric effect in 1887, during his experiments on radio waves. Hertz had set up a receiver for radio waves consisting of a spark gap in a curved piece of brass capped with small metal spheres.
What did Hertz observe about the photoelectric effect? In 1887, Heinrich Hertz made the observation that when light strikes a metal surface, certain electrons close to the surface can absorb enough energy from the incoming radiation to overcome the attraction of the positive ions in the surface material.
The Photoelectric Effect. Michael Fowler, UVa. Hertz Finds Maxwell's Waves: and Something Else. The most dramatic prediction of Maxwell's theory of electromagnetism, published in 1865, was the existence of electromagnetic waves moving at the speed of light, and the conclusion that light itself was just such a wave.
Aug 23, 2023 · The photoelectric effect was first documented in 1887 by the German physicist Heinrich Hertz and is therefore sometimes referred to as the Hertz effect. While working with a spark-gap transmitter (a primitive radio-broadcasting device), Hertz discovered that upon absorption of certain frequencies of light, substances would give off a visible spark.
