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Properties of lenses
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Learning goals We are learning to the types of lenses.
We are learning to find images in lenses.
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1. Converging lenses Lens that is thickest in middle
Causes light rays that are parallel to PA to converge, or meet at one point called the principal focus (F)
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2. Diverging lens Thinnest in middle
Causes parallel light rays to diverge, or spread apart
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terminology focal point (F) where light either comes to a focus or appears to diverge from a focus on the opposite side of the lens is represented by F’ focal length, f, is the distance from axis of symmetry to principal focus measured along principal axis.
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Emergent ray light ray that leaves lens after refraction
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Learning goals We are learning to the types of lenses.
We are learning to find images in lenses.
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