About the Authors

Christopher M. Williams

Affiliation Physics Department, Bard College at Simon's Rock, Great Barrington, Massachusetts, United States of America

Eric M. Kramer

ekramer@simons-rock.edu

Affiliation Physics Department, Bard College at Simon's Rock, Great Barrington, Massachusetts, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: CMW EK. Performed the experiments: CMW EK. Analyzed the data: EK. Wrote the paper: EK.