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Refraction of Light

Lens Formula

The relationship between distance of the object (u), distance of the image (v) and focal length (f) of the lens is called lens formula or lens equation.

This lens formula is applicable to both convex and concave lenses.

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Refraction of Light

	Introduction
	Refraction of Light
	Laws of Refraction
	Relation Between the Refractive Indices
	Refraction of Light through a Glass Slab
	Verification of Snell's Law
	Total Internal Reflection
	Mirage and Looming
	Lenses
	Terminology Used in Optics
	Formation of Image by a Convex Lens
	Formation of Image by a Concave Lens
	Sign Convention for Lenses
	Lens Formula
	Derivation of Lens Formula (Convex Lens)
	Derivation of Lens Formula (Concave Lens)
	Magnification
	Power of a Lens
	The Eye
	Working of an Eye
	Power of Accommodation
	Range of Vision
	Defects of Vision
	Hypermetropia
	Myopia
	Astigmatism
	Conclusion
Animations
	Refraction
	Laws of Refraction
	Refraction of Light Through a Glass Slab
	Verification of Laws of Refraction
	An Alternate Method
	Some Effects of Refraction
	Total Internal Reflection
	Effects of Total Internal Reflection
	Lenses
	Lenses Basic Terminology
	Image formation by a Convex Lens
	Image formation by a Concave Lens
	Sign Convention for Lenses
	Determination of Focal length of a Convex Lens
	Determination of Focal Length of a Convex Lens
	Refraction - An Activity
	External Features of the Human Eye
	Defects of Vision

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