In 1911, Rutherford established that an atom has a positively charged nucleus, which contains most of the mass of the atom. Surrounding the nucleus are light, negatively charged
It was observed that the emission spectra of hydrogen atoms consisted of some sharp lines with well defined wavelengths.
Bohr model: In 1913 Bohr presented a model of the hydrogen atom, in which the electron was assumed to move in a circle about the nucleus. Bohr assumed that only certain orbits were allowed,
and that the atom emits or absorbs a photon when the electron makes a transition from one orbit to another. He succeeded in deriving the line spectrum of hydrogen. However, almost nothing else
could be explained by this model, and there was no way to extend it to other atoms.
It took the emergence of quantum mechanics, as developed by Schrodinger, Heisenberg, and others, to set the stage for the new era of modern physics.
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.
The book offers a complete review of your AP course, strategies to give you the edge on test day, and plenty of practice with AP-style test questions. It includes full length practice exams modeled on the real test and all the terms and concepts you need to know.
This book includes a review of all the topics tested including vectors, kinematics, fluid mechanics, optics and nuclear physics. Additionally, the book includes two full length tests made complete with descriptive solutions, and quick study tables for Physics B formulas and equations.