Category Archives: Optics

Dircks and Pepper: A Tale of Two Ghosts

It is often told that in the 1860s, John Henry Pepper used science and technology to invent a ghost. Or did he? This is the surprisingly tricky question that we will try to answer in this lengthy post. It is a … Continue reading

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Light, by Kimberly Arcand and Megan Watzke

I have a lot of catching up to do in terms of popular science books, so I’ve recently been doing an intense amount of reading.  A lot of my focus has been on reading books by people I’m acquainted with … Continue reading

Posted in Optics, Physics | 1 Comment

“Singular Optics” is available for pre-order!

Those who know me well know that I’ve been working hard for several years on a new optics textbook.  Well, I can finally say that it is available for pre-order on Amazon!  The book is Singular Optics, by me: Gregory … Continue reading

Posted in Optics, Personal | 2 Comments

Optics by hot air balloon?

The first in a (hopefully) series of posts inspired by topics covered in my upcoming textbook on singular optics. Crewed balloon rides have a surprisingly large role in the history of science.  The first untethered balloon flight was performed in Paris on November … Continue reading

Posted in Optics, Physics | 2 Comments

Physics demonstrations: the Mirascope

I recently participated again in the annual UNCC Science and Technology Expo, showing off neat science demos to the public.  This year, I decided to add a table of “Optics and Illusions,” to show how science and our own brains can … Continue reading

Posted in Optics, Physics demos | 1 Comment

Optics and infinity at American Scientist!

I’ve been kind of quiet here lately, partly due to my job and partly due to writing blog posts and essays for other venues.  Happily, one of these blog posts is now available to read over at American Scientist, on … Continue reading

Posted in Mathematics, Optics, Personal | 1 Comment

Hilda Hänchen and the Goos-Hänchen effect

Today, the United Nations declared February 11 to be the “International Day of Women and Girls in Science,” starting a new effort to get more women into science and keep them there.  In honor of this new day, I thought … Continue reading

Posted in History of science, Optics, Women in science | 5 Comments