Light travels at around 300,000 km per second. Why not faster? Why not slower? A new theory inches us closer to an answer.

Why this particular speed and not something else? Or, to put it another way, where does the speed of light come from?

Electromagnetic theory gave a first crucial insight 150 years ago. The Scottish physicist James Clerk Maxwell showed that when electric and magnetic fields change in time, they interact to produce a travelling electromagnetic wave. Maxwell calculated the speed of the wave from his equations and found it to be exactly the known speed of light. This strongly suggested that light was an electromagnetic wave – as was soon definitively confirmed.aeon

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Frontier in Optics
09/16/2018 - 09/20/2018    
All Day
Attend Your Annual Meeting: OSA Frontiers in Optics + Laser Science APS/DLS Venue and Registration Hours Registration is located on the Terrace Level, Washington Hilton, 1919 Connecticut [...]
AmeriCOM Symposium
09/27/2018    
7:30 am - 1:30 pm
On July 21, 2017, President Trump issued an executive order on assessing and strengthening the manufacturing and defense industrial base and supply chain resiliency of the [...]
New York Photonics Annual Golf Tournament
09/27/2018    
12:30 pm - 4:30 pm
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AmeriCOM Networking Reception & Rochester's Photonics Clambake
09/27/2018    
4:30 pm - 9:00 pm
After three days of technical SBIR reviews, the roll-out of AmeriCOM and nine holes of golf, people are going to be thirsty and hungry.  We’ve got [...]
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