Throughout this UAH Library subject guide page for Optics, content and inspiration came from several different sources.
Within this page for Basic Concepts, credit for the above information goes to the Credo Online Reference Service:
Credo Reference. (2020). Libguides: Physics: Optics, Magnetism, & Electricity. Retrieved April 14, 2020, from credoreference.libguides.com/c.php?g=139772&p=915446.
There are many ways that you can reach us for your research questions and general reference help: