Cover Story
Lasers: Magic Bullets of the Cosmetic Revolution?
Susan M. Reiss
CO2 and erbium laser systems are the current lasers of choice for skin resurfacing applications. But which is better and are there alternatives? Reiss addresses these questions, and looks at the needs—both in training and... more>>
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Holography and Holographic Interferometry
Masud Mansuripur
Holography dates back to 1947,
when Hungarian-born British
scientist Dennis Gabor (1900-1979)
developed the theory of holography
while working to improve electron
microscopy. Gabor coined the
term hologram from the Greek
words holos (meaning whole) and
gramma (meaning message). The
1971 Nobel prize in physics was
awarded to Gabor for this invention. more>>
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Two Nice Diffraction Experiments
Michael Knotts
This month I bring you two excerpts from Robert Ehrlich's book Turning the World Inside Out and 174 Other Simple Physics Demonstrations (see "Light Touch," January 1998). Ehrlich is professor of physics at George Mason University in Fairfax,
Va. The demonstrations described
produce nice results, yet are very simple and inexpensive to set up. A small pen light with a Krypton bulb or a small decorative bulb serves as an excellent light source for them. Enjoy! more>>
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UUDeview: Yet Another Format Converter
Bob Jopson
At one time, most e-mail was text,
readable on a screen. Now, many
types of non-textual information
are being transmitted using a large variety of formats. When browsers such as Mosaic, Netscape, or Internet Explorer are used to obtain information,
format conversions are often transparent to the user. However,
once one leaves this cozy world, format conversion can be a problem. more>>