Richard P. Feynman would have turned 95 today. We’ll miss him always.

Gold dust:

Lecture 1: Law of Gravitation — An Example of Physical Law http://bit.ly/10nWIDw

Lecture 2: The Relation of Mathematics and Physics http://bit.ly/11YPw2X

Lecture 3: The Great Conservation Principles http://bit.ly/11YPs3j

Lecture 4: Symmetry in Physical Law http://bit.ly/17aAa1n

Lecture 5: The Distinction of Past and Future http://bit.ly/1351R52

Lecture 6: Probability and Uncertainty — The Quantum Mechanical View of Nature http://bit.ly/10ArKh1

Convergent plate boundaries. Also take a look to the animated version (flash). You can have a good time in these pages.

Source: Volcanoes (Chapters 6 and 7), Earthquakes, Volcanoes and Natural Hazards, M. Colberg’s Geology course, Southern Utah University.

Overview of the electron diffraction tube.

(1) 4-mm socket for filament heating supply, (2) 2-mm socket for cathode connection, (3) internal resistor, (4) filament. (5) cathode, (6) anode, (7) 4-mm plug for anode connection (HV), (8) focusing electrode, (9) polycrystalline graphite grating, (10) Boss, (11) fluorescent screen.

Source: Electron Diffraction, Modern Lab Experiments, Department of Physics (Florida International University)