Light
Light is wave energy whose reflection obeys two laws and produces real or virtual images.
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Light: Properties, Reflection and Images
Light is wave energy whose reflection obeys two laws and produces real or virtual images.
Open article →Light: Spherical Mirrors, Images and Equations
Concave and convex mirrors form predictable images described by ray position and equations.
Open article →Light: Mirror Signs and Applications
Cartesian signs interpret mirror distances, while mirror shape determines focus and field of view.
Open article →Light: Refraction Laws and Refractive Index
Light bends because its velocity changes between optical media; Snell's law quantifies the change.
Open article →Light: Dispersion and Scattering
Learn step by step why a prism forms a spectrum, the sky is blue, sunsets are red and clouds are white.
Open article →Light: Convex and Concave Lenses, Uses and Images
Learn what convex and concave lenses do, how simple rays form images, and why each lens is used.
Open article →Light: Lens Equations, Magnification and Power
Lens position, size, construction and convergence are quantified through four relationships.
Open article →Light: Human Eye and Optical Instruments
The eye focuses with a flexible convex lens; corrective lenses and instruments extend vision.
Open article →Light: Total Internal Reflection and Optical Fibres
Beyond the critical angle, light remains in the denser medium and can be guided through fibres.
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