Physics

SI Base Units

Menu SI Base Units Last Revision: July 13, 2025 Introduction Exponentiation and Scientific Notation Primer SI Base Units SI Base Unit Definitions Introduction This post describes the 7 SI Base Units.  I first give you a basic primer on scientific notation  because some of the base units deal with very big and very small numbers. 

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A Listing of Key Events in Electricity and Magnetism

Menu (linked Index) A Listing of Key Events in Electricity and Magnetism Last Update: June 5, 2025  Introduction Recognizing Michael Faraday Recognizing James Clerk Maxwell Chronological Listing of key events and milestones in Electricity and Magnetism Introduction to Chronology of Events in Electricity and Magnetism This post tabulates significant milestones and events in our understanding

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Hawk Eye

Understand Your Eyes

Menu (linked Index) Understanding Your Eyes – A Guide to Anatomy, Vision, and Correction Last Update: January 10, 2025 Introduction Eye Anatomy  Light to Vision Pathway Physics of the Eyes Vision Impairment and Correction Introduction In the book “The Auto Biography of Malcolm X” , Malcolm writes……”I would just like to study. I mean ranging

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Lens Ray Diagrams

Menu (linked Index) Lens Ray Diagrams Last Update: October 21, 2024 Introduction Convex and Concave Lens Basics Ray Diagram Drawing Rules Convex and Concave Lens Ray Diagram (O>2F) Convex and Concave Lens Ray Diagram (O=2F) Convex and Concave Lens Ray Diagram (2F>O>F) Convex and Concave Lens Ray Diagram (O=F) Convex and Concave Lens Ray Diagram

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Lens Equations

Menu (linked Index) Lens Equations Last Update: October 21, 2024 Introduction Symmetrical Concave and Convex Lens Using Ray Diagrams to Determine the Lens Equations Lens Magnification Equation Thin Lens Equation Curved Surface Refraction Equation Derivation Lens Maker’s Equation Introduction In this post we’ll derive the following key lens equations: The Lens Magnification Equation The Thin

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