“Scientific method”
https://en.wikipedia.org/wiki/Scientific_method
This page gives an overview of what the scientific method is and its history. It describes the scientific method’s contributors and ideas.
“Difference Between Induction and Deduction”
https://www.differencebetween.com/difference-between-induction-and-vs-deduction/
This article describes the differences between induction and deduction. It describes induction as combining arguments and premises to arrive at a conclusion while deduction is arriving at a conclusion based on observations.
“Fact”
https://www.merriam-webster.com/dictionary/fact
This page has the dictionary of “fact:” “something that has actual existence.”
“Snell’s law”
https://en.wikipedia.org/wiki/Snell%27s_law
This article describes Snell’s law, its history, and contributors. It says that Snell’s law is “a formula used to describe the relationship between the angles of incidence and refraction, when referring to light or other waves passing through a boundary between two different isotropic media, such as water, glass, or air.”
