1 / 5

A VERY BRIEF HISTORY OF TIME

A VERY BRIEF HISTORY OF TIME. By: Brian Williams. What are “things” made of?. Aristotle - four elements Earth, Water, Air, and Fire Atomic Theory - All things are made up of small, indivisible pieces of matter called atoms. Proposed by John Dalton in the early 1800’s.

lajos
Télécharger la présentation

A VERY BRIEF HISTORY OF TIME

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. A VERY BRIEF HISTORY OF TIME By: Brian Williams

  2. What are “things” made of? • Aristotle- four elements • Earth, Water, Air, and Fire • Atomic Theory- All things are made up of small, indivisible pieces of matter called atoms. Proposed by John Dalton in the early 1800’s.

  3. What makes “matter” move? • Pre-Newton- Science was descriptive, based on observation • Isaac Newton- Provided qualitative descriptions of motion, developed three laws of motion; the father of “Classical Mechanics”

  4. What is matter REALLY made of? • Electron- Discovered in 1897 by J.J. Thomson, using cathode rays. Thomson was able to measure e/m, and thus deduce the mass of the electron. • Nucleus- Discovered in 1910 by Ernest Rutherford while doing experiments with alpha particles. • Bohr Model- negatively charged electrons orbit a small, positively charged nucleus, the atom consists of mostly empty space.

  5. What’s the problem? • The Bohr Model wasn’t consistent with classical mechanics. • In fact, there was no way for classical mechanics to explain the atom, so a new theory was required!

More Related