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Optics Applet

This applet allows users to simulate standard optic elements (lens, mirror, dielectrics, sources, apertures) and observe the ways that light rays propagate through these elements.

http://webphysics.davidson.edu/applets/optics4/default.html

Atomic Spectra Databases

The database contains data for transitions and energy levels in atoms and atomic ions, including transitions of 99 elements and energy levels of 51 elements.

http://physics.nist.gov/PhysRefData/ASD1/choice.html?nist_atomic_spectra.html

Periodic table of the elements

An interactive periodic table of the elements

http://www.chemicalelements.com/

Liquid Helium

Kamerlingh Onnes worked for many years to liquify the element which persisted as a gas to the lowest temperature.

http://hyperphysics.phy-astr.gsu.edu/hbase/lhel.html#c1

Magnetic Formulas

A small web site devoted to the vanishing art of practical magnet design without FEA (Finite Element Analysis).

http://www.netdenizen.com/emagnet/

Admittance

For a given circuit element, the admittance is just the reciprocal of the impedance.

http://hyperphysics.phy-astr.gsu.edu/hbase/electric/parres.html#c4

What are fullerenes

Until 1985, the chemical element Carbon was only known to exist in two forms - diamond and graphite. This changed when physicists discovered an entirely new form of carbon - the fullerene molecule.

http://www.nottingham.ac.uk/~ppzjld/what.htm

An Interactive Periodic Table

A clickable periodic table that gives detailed element information on the history of its discovery, sources, as well as its compounds, isotopes and uses.