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Physics: What We Do and Don’t Know. By Steven Weinberg

Physics: What We Do and Don’t Know. By Steven Weinberg | Science at work | Scoop.it

In the past fifty years two large branches of physical science have each made a historic transition. I recall both cosmology and elementary particle physics in the early 1960s as cacophonies of competing conjectures. By now in each case we have a widely accepted theory, known as a “standard model.”

 

Cosmology and elementary particle physics span a range from the largest to the smallest distances about which we have any reliable knowledge. The cosmologist looks out to a cosmic horizon, the farthest distance light could have traveled since the universe became transparent to light over ten billion years ago, while the elementary particle physicist explores distances much smaller than an atomic nucleus. Yet our standard models really work—they allow us to make numerical predictions of high precision, which turn out to agree with observation.

Up to a point the stories of cosmology and particle physics can be told separately. In the end, though, they will come together.

 
Via Dr. Stefan Gruenwald
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(EN) - Chemistry Dictionary | nas.net

(EN) - Chemistry Dictionary | nas.net | Science at work | Scoop.it

"Chemistry Dictionary (nas.net)"


Via Stefano KaliFire
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STEMbite - Math, Biology, Chemistry, Physics and more - Math/Science in your everyday life and in your home!

STEMbite - Math, Biology, Chemistry, Physics and more - Math/Science in your everyday life and in your home! | Science at work | Scoop.it
STEMbite was created by Andrew Vanden Heuvel, mostly because he needed something to do with his Google Glass. Andrew loves trying to do interesting and cool ...

Via Tom D'Amico (@TDOttawa)
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Physics: What We Do and Don’t Know. By Steven Weinberg

Physics: What We Do and Don’t Know. By Steven Weinberg | Science at work | Scoop.it

In the past fifty years two large branches of physical science have each made a historic transition. I recall both cosmology and elementary particle physics in the early 1960s as cacophonies of competing conjectures. By now in each case we have a widely accepted theory, known as a “standard model.”

 

Cosmology and elementary particle physics span a range from the largest to the smallest distances about which we have any reliable knowledge. The cosmologist looks out to a cosmic horizon, the farthest distance light could have traveled since the universe became transparent to light over ten billion years ago, while the elementary particle physicist explores distances much smaller than an atomic nucleus. Yet our standard models really work—they allow us to make numerical predictions of high precision, which turn out to agree with observation.

Up to a point the stories of cosmology and particle physics can be told separately. In the end, though, they will come together.

 
Via Dr. Stefan Gruenwald
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Amazing science is best knowledge updated..
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Amazing Science: Nanotechnology Postings

Amazing Science: Nanotechnology Postings | Science at work | Scoop.it

Nanotechnology includes fields of science as diverse as surface science, organic chemistry, molecular biology, semiconductor physics, microfabrication, and others. The associated research and applications are equally diverse, ranging from extensions of conventional device physics to completely new approaches based upon molecular self-assembly, from developing new materials with dimensions on the nanoscale to direct control of matter on the atomic scale. Nanotechnology may be able to create many new materials and devices with a vast range of applications, such as in medicine, electronics, and biomaterials.


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Rajat Kumar - WHICH SUBJECT YOU HATE MOST?? 1.PHYSICS... | Facebook

WHICH SUBJECT YOU HATE MOST??
1.PHYSICS
2.MATHS
3.CHEMISTRY
4.COMPUTER SCIENCE
5.BIOLOGY
6.ENGLISH
7.HISTORY
8.GEOGRAPHY
9.OTHERS(MENTION NAME)
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