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From our Readers
Jun 1, 2013 — Laser spark plug dream is still alive Thanks for the feature article on laser ignition (“Laser Car Ignition Dream Sparks Multiple Approaches,” September 2012). I worked on laser ignition systems in the early 1980s with PerkinElmer and Sandia National Laboratories, at a time when lasers were so expensive it would have been prohibitive to go beyond proof of concept. But we always knew this would be the future of internal combustion, especially with ethanol, because ethanol can be...
Letters
May 1, 2013 — The importance of hands-on learning In the January 2013 “Workforce of Tomorrow” column (p. 87), distance learning is suggested to augment education. But in some fields, nothing replaces in-the-trenches association with qualified...
Something in the air
Jul 1, 2012 — The recent article on airglow (“The Night Glows Brighter in the Near-IR,” April 2012) contains misleading statements and a generally sloppy treatment of radiometric units of measure. Some behind-the-scenes math by the authors and more...
Letters To The Editor
Feb 1, 2012 — Changes in Optical Radiation Instrumentation I have been involved in the light or optical radiation measurement industry for more than four decades. In the early years, a major strength was that we continually provided new, often unique, reliable...
Letters to the Editor
Nov 1, 2011 — Corning Still Makes Calcium Fluoride In Lynn Savage’s article “Property Management: A Review of Optical Materials” (September 2011), Brandon Light of Optimax Systems Inc. was quoted as saying, “For example, New...
Letters to the Editor
Jun 1, 2011 — Quality matters, in art and engineering The recent “Peregrinations” article on Vincent van Gogh (Photonics Spectra, April 2011, p. 98) caught my attention. First, my background: I am a registered (design) engineer, probably the oldest...
Letters
Feb 1, 2011 — Pros and cons I enjoyed the article “Will LEDs lead to a greener world? Maybe,” in the GreenLight section of the magazine (November 2010, p. 27). I was enlightened by the concept that even though LEDs are more energy-efficient than...
Letters to the Editor
Oct 1, 2010 — Is it really ball lightning? I have to be very skeptical about the premise that magnetic fields are generating phosphenes that appear to be ball lightning (“Great balls of magnetism!” p. 68, July 2010). My experience with phosphenes,...
Letters to the Editor
Jul 1, 2010 — Solar array size important In Anne L. Fischer’s interesting article titled “Solar-heated bridges, roads” (February 2010, p. 38), she did not comment on the size of the solar array that would be needed. Because the roadway itself is...
Letters to the Editor
Jan 4, 2010 — A question on energy I was pleased to see the GreenLight article “Making energy personal” (October, p. 35) on photocatalytic water conversion. In my opinion, this is the only lo...
Letters to the Editor
Dec 1, 2009 — On another planet? Kevin Bolam’s letter in the October issue of Photonics Spectra has left me (almost) speechless.Women are not making breakthroughs in science? Women have passion toward family but not their careers?In what era is Mr. Bolam...
Letters to the Editor
Nov 1, 2009 — The science sex gap I read Gary Boas’ article (“Understanding the ‘sex gap’ in science and math,” September, p. 45) with interest. I have been interested in science since I was a child. While in middle school, I remember my math instructor teaching...
Letters to the Editor
Oct 1, 2009 — Benefits, not danger I read with interest the article by Gary Boas titled, “Just how dangerous are foreign researchers?” (June 2009, p. 62). I came to the US many years ago as a postdoctoral fellow from Germany and experienced firsthand the many...
Letters to the Editor
Sep 1, 2009 — White Elephant in Space? Many view the International Space Station (“Solar-powered space station,” Photonics Spectra, July, p. 36), as a $150 billion “white elephant” in space that has sucked resources from many other more worthwhile programs –...
Letters to the Editor
Aug 1, 2009 — Solar coffee shop? I was intrigued by your articles on solar power in the May issue and have a question I hope you can help me with. I am a member of a Hewlett-Packard survey group that discusses topics such as various aspects of technology. One...
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May 2024
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