Properties of lenses.

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Presentation transcript:

Properties of lenses

Learning goals We are learning to the types of lenses. We are learning to find images in lenses.

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)

2. Diverging lens Thinnest in middle Causes parallel light rays to diverge, or spread apart

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.

Emergent ray light ray that leaves lens after refraction

Learning goals We are learning to the types of lenses. We are learning to find images in lenses.

Please complete P.553 #1-6