About the Authors

David P. Wilson

davewilson13@gmail.com

Affiliation Department of Physics, Albion College, 611 E. Porter St., Albion, Michigan, United States of America

Competing Interests

The author has declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: DPW. Analyzed the data: DPW. Contributed reagents/materials/analysis tools: DPW. Wrote the paper: DPW.