Reference Terms
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Photoelectric effect
The photoelectric effect is the emission of electrons from matter upon the absorption of electromagnetic radiation, such as ultraviolet radiation or x-rays.
Note: The above text is excerpted from the Wikipedia article "Photoelectric effect", which has been released under the GNU Free Documentation License.
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Matter & Energy News
September 17, 2024
Sep. 17, 2024 — Van Gogh's brushstrokes in 'The Starry Night' create an illusion of sky movement so convincing it led researchers to wonder how closely it aligns with the physics of real skies. Marine sciences and fluid dynamics specialists analyzed the painting to ...
Sep. 11, 2024 — Physicists have created the first two-dimensional version of the Bose glass, a novel phase of matter that challenges statistical ...
Sep. 11, 2024 — Researchers have created microscale robots less than 1 millimeter in size that are printed as a 2D hexagonal 'metasheet' but, with a jolt of electricity, morph into preprogrammed 3D shapes and ...
Sep. 10, 2024 — Methane concentrations in Earth's atmosphere increased at record speed over the past five years. At least two-thirds of annual methane emissions now come from human activities, including fossil fuel use, agriculture, and landfills and other ...
Latest Headlines
updated 12:56 pm ET
Sep. 17, 2024 — Deep inside what we perceive as solid matter, the landscape is anything but stationary. The interior of the building blocks of the atom's nucleus -- particles called hadrons that most of us would ...
Sep. 17, 2024 — A new type of OLED (organic light emitting diode) could replace bulky night vision goggles with lightweight glasses, making them cheaper and more practical for prolonged use, according to ...
Sep. 17, 2024 — In a new paper, physicists argue that close observations of merging black hole pairs may unveil information about potential new ...
Sep. 17, 2024 — A new article describes a fingernail-sized machine that can twist thin materials at will, replacing the need to fabricate twisted devices one by ...
Sep. 17, 2024 — A reaction that puzzled scientists for 50 years has now been explained by researchers at Ume University. Rapid structural snapshots captured how ...
Sep. 17, 2024 — New technology has allowed scientists to create ultra short ion pulses, with a duration of less than 500 picoseconds. This can be used to analyze materials or even make chemical reactions visible in ...
Sep. 17, 2024 — Thanks to nanoscale devices as small as human cells, researchers can create groundbreaking material properties, leading to smaller, faster, and more energy-efficient electronics. However, to fully ...
Sep. 17, 2024 — Physicists on the CMS experiment announce the most elaborate mass measurement of a particle that is notoriously difficult to study and has captivated the physics community for ...
Sep. 17, 2024 — Understanding the relationship between plasticity of muddy soil and earth pressure can be crucial to maintaining tunnel stability and predicting ...
Sep. 13, 2024 — The low-energy excited state of thorium-229 (229Th) isotope nucleus has recently gained much attention owing to it being an ideal candidate for ultra-precise nuclear clocks. Building such ...