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The source of Einstein's proposal that light was composed of particles ( or could act as particles in some circumstances ) was an experimental anomaly not explained by the wave theory was the photoelectric effect, by which light striking a metal surface ejected electrons from the surface, causing an electric current to flow across an applied voltage.
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Some Related Sentences
source and Einstein's
Such a universe would need a source of " anti-gravity " to balance out the mutual attraction, a scalar term in Einstein's equations that would come to be known as the cosmological constant.
What this means is addressed in the following three sections, which explore the motion of so-called test particles, examine which properties of matter serve as a source for gravity, and, finally, introduce Einstein's equations, which relate these matter properties to the curvature of spacetime.
source and proposal
Although Grothendieck himself never published his work in this area, the proposal became the inspiration for work by other mathematicians and the source of the theory of dessins d ' enfants.
The proposal by political scientist Samuel P. Huntington is that people's cultural and religious identities will be the primary source of conflict in the post – Cold War world.
As controlled nuclear fusion has proven difficult to use as an energy source, an alternate proposal for producing fusion power has been to detonate nuclear fusion explosives inside very large underground chambers and then using the heat produced, which would be absorbed by a molten salt coolant which would also absorb neutrons.
Conversely the final policy represented a victory for business interests ( who feared competition from the government in the area of applied research and who saw Kilgore's patent law proposal as a threat to their property rights ) and for scientists ( who gained control of what would later become an important source of resources and professional autonomy ).
While the proposal for Phoenix was being written, the Mars Odyssey Orbiter used its gamma ray spectrometer and found the distinctive signature of hydrogen on some areas of the Martian surface, and the only plausible source of hydrogen on Mars would be water in the form of ice, frozen below the surface.
Smith defended the use of Video Lottery Terminals as a source of government revenue, and rejected a 2003 proposal from Progressive Conservative MLA John Loewen to phase out most terminals from the province.
To prevent the possibility of corruption of the source texts, the eventual goal of the MUFI is to create a consensus on which characters to encode, and then present a completed proposal to the Unicode authorities.
source and light
With a spare battery, a source of light for 2 weeks or more would be assured.
( Note: Because of light leakage from one ultraviolet source to another, the lights are switched by a commutator-like assembly rotated by a synchronous motor.
With the source of light behind the copy, there is no loss of lumen output, as with conventional boards illuminated by means of reflected light.
Two types of light source were used, a thousand watt projection lamp and an AH6 high pressure mercury arc.
Changes of intensity on the cell were achieved by use of a wire screen and by varying the distance of the light source from the cell.
It was possible to make estimates of the quantum yield by observing the extent of reduction of a uranyl oxalate actinometer solution illuminated for a known time in a typical reaction cell and making appropriate conversions based on the differences in the absorption spectra of uranyl oxalate and of chlorine, and considering the spectral distribution of the light source.
That meant that something between the light and its reflection on the wall was moving closer to the source of the light -- in this case, the window.
The Yang, or male principle, was the source of light, heat, and dynamic vitality, associated with the Sun ; ;
The ideal grade is called " Deep Siberian " and has a primary purple hue of around 75 – 80 %, with 15 – 20 % blue and ( depending on the light source ) red secondary hues.
It turns blue in natural sunlight and any other partially or wholly ultraviolet light source.
Those described as having only light perception have no more sight than the ability to tell light from dark and the general direction of a light source.
* the bandwidth of the output of some light source, e. g., an ASE source or a laser ; the bandwidth of ultrashort optical pulses can be particularly large
The candela ( or ; symbol: cd ) is the SI base unit of luminous intensity ; that is, power emitted by a light source in a particular direction, weighted by the luminosity function ( a standardized model of the sensitivity of the human eye to different wavelengths, also known as the luminous efficiency function ).
The definition describes how to produce a light source that ( by definition ) emits one candela.
If the source emits light uniformly in all directions, the flux can be found by multiplying the intensity by 4π: a uniform 1 candela source emits 12. 6 lumens.
The caver's primary light source is usually mounted on the helmet in order to keep the hands free.
In air and other ordinary gases below the breakdown field, the dominant source of electrical conduction is via relatively few mobile ions produced by radioactive gases, ultraviolet light, or cosmic rays.
* indirect illumination — surfaces illuminated by light reflected off other surfaces, rather than directly from a light source ( also known as global illumination )
source and was
Another source of intellectual stimulus was opened to her at that time by the founding of Johns Hopkins University within walking distance of home.
The great spectacle was a source of rancor, and Son et Lumiere, which the French were trying to promote with the Athenians, was the reason.
Without a precise knowledge of Germanic philology, however, it is debatable whether their use was not more often a source of confusion and error than anything else.
The letters took their source from a stream of my imagination in which I was transformed into a young man not unlike my bunkmate Eliot Sands -- he of the porch steps anecdotes -- who smoked cigarettes, performed the tango, wore fifty dollar suits, and sneaked off into the dark with girls to do unimaginable things with them.
A wall-stabilized high-current arc source was constructed and used to study transition probabilities of atomic hydrogen and oxygen.
The power source was a commercial D. C. rectifier.
These dosages could have been increased by increasing the source strength which was small in this case.
The maximum distance sampled was 23 miles from the source.
Each questionnaire was audited for obvious mistakes and for comments, and was identified by a serial number, by the source list from which the company name was selected, and by the geographical location of the company as determined by the postmark on the return envelope.
The greatest source of trouble was rain which had repeatedly flowed from openings above, soaking the surface and leaving streaks of dissolved lime, very conspicuous even after cleaning, particularly in the `` Landing of Columbus '', `` Oglethorpe and the Indians '', and `` Yorktown ''.
During the trip Selkirk decided that the route through Illinois territory to Indiana and the eastern United States was the best route for goods from England to reach Red River and that the United States was a better source of supply for many goods than either Canada or England.
During the first administration of Bienville, the peltry trade of the Mobile district was a lucrative source of revenue.
For Blanche, Kitti's death was a source of guilty, but nonetheless soaring, happy hope.
This was disclosed today by a responsible source amid intensified efforts by the Soviet Union to gain a greater role in the staff and operation of the United Nations.
Another source of NBC pride was its rare film clip of Bix Beiderbecke, but this view of the great trumpeter flew by so fast that a prolonged wink would have blotted out the entire glimpse.
This was no man's land, disputed by the Haijac Union and the Israeli Republic, a potential source of war for the last two hundred years.
The war effort was the source of continued disparagement of Lincoln, and dominated his time and attention.
This was a compromise arrangement for a broadcast time scale: a linear transformation of the BIH's atomic time meant that the time scale was stable and internationally synchronised, while approximating UT1 means that tasks such as navigation which require a source of Universal Time continue to be well served by public time broadcasts.
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