Particle Vs. Wave – Light’s Timeless Question

Since light was first studied in the sixth century B.C., arguments had raged about its essence. Some Ancient Greeks considered light to flow in particles, like the atoms that made up all matter. Others thought it to be shimmering waves called eidola.  Particle or wave?  The debate summoned all of light’s mysteries.

Thomas Young's sketch of two-slit interference based on observations of water waves. Credit: Wikimedia Commons.

Thomas Young’s sketch of two-slit interference based on observations of water waves. Credit: Wikimedia Commons.

Continue reading

Fresnel – A life full of achievements

The year of 2015, chosen to stage the UNESCO International Year of Light 2015, coincided with many anniversaries regarding history of the science of light and one of these was Fresnel’s Wave Theory of Light. Quite frankly there could be an anniversary for Fresnel each year for the next six years to celebrate one of his many achievements, each one equal to the magnitude of and stems from his wave theory.

Augustin_Fresnel Continue reading