This applet plots the velocity of a uniformly accelerated body, as seen from an inertial frame of reference. The local acceleration, that is, the acceleration perceived by the travellers, can be edited with the control bar.
As can easily be seen, the velocity approaches asintotically to the speed of light. That is, the acceleration appears to cease as seen from the inertial frame, but its still constant in the moving one.
The time appears to run slower in the moving frame as seen from the inertial one.
Also, the classical results for the same problem can be plotted in order to compare the differences.
Showing posts with label Physics. Show all posts
Showing posts with label Physics. Show all posts
Saturday, November 17, 2012
Friday, September 7, 2012
Dioptric surface
This applet makes a simple ray tracing of a dioptric surface. The source can be moved by drag and drop, and the dioptric surface can be edited. It works fine just for the left surface.
Saturday, September 1, 2012
Mirrors
This applet simulates the behavior of a mirror. The source can be moved by drag and drop, and the mirror's surface can be edited. It works fine for both front and back surfaces.
Monday, June 25, 2012
Thin lenses
This applet illustrates the model of thin lenses. Using a negative focal length will provide a divergent lens. The object position can be manipulated dragging the blue dot labeled as object.
Snell's law
This applet illustrates the Snell's law, also known as law of refraction for obvious reasons. The user can drag the blue dot in order to change the incident angle, and manipulate the two refraction indexes.
Tuesday, May 22, 2012
Simple molecule
This applet illustrates the simplest model for a ionized hydrogen molecule (two protons + one electron), treated as two hydrogen atoms in the ground state. The user can manipulate the internuclear distance (R).
Questions:
· One of the two states is unable to form stable molecules. Wich one is it?
· What happens to the energy for R >> 0? And for R near to zero?
· Can you estimate the equilibrium distance?
Questions:
· One of the two states is unable to form stable molecules. Wich one is it?
· What happens to the energy for R >> 0? And for R near to zero?
· Can you estimate the equilibrium distance?
Monday, May 21, 2012
Semiconductors
This applet shows the simplest model for a semiconductor crystal. It plots the hole and electron densities, letting the user manipulate all the parameters.
Notice that if the Fermi energy raises, the density of electrons in the conduction band and also the density of holes in the valence band raises too. A practical way to raise the Fermi energy is by adding impurities to the crystal.
Notice that if the Fermi energy raises, the density of electrons in the conduction band and also the density of holes in the valence band raises too. A practical way to raise the Fermi energy is by adding impurities to the crystal.
Fine structure splitting
This applet shows the first energy levels of the hydrogen atom splitted due to the fine structure perturbation. The value of the fine structure constant can be manipulated; using the actual value (1/137) gives an almost imperceptible splitting in the scale of the eV.
Thursday, May 3, 2012
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