02_05_Lenses

# 02_05_Lenses - Today 2/5 o o o o Images and Lenses Lab Any...

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Today 2/5 o Images and Lenses o Lab: Any Questions? o Start reading chapter 26.6-8 on Lenses o HW: 2/5 “Converging Lens” (3 pages) Due Friday, 2/7 o Exam I Thursday, Feb 13

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This Week’s Lab Pins “Images” will not line up when the “objects” do
This Week’s Lab Pins “Objects” will not line up when the “Images” do

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Lenses -- Wave Picture A converging lens bends light toward the axis
Lenses -- Ray Picture A converging lens bends light toward the axis like a prism ? n = 1.5 n = 1.0 n = 1.0 “Thin Lens” approximation assumes a single bend at the midline.

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Converging Lenses A converging lens bends light toward the axis Focal point is the place on the axis where all rays arriving parallel to the axis are directed “In parallel-out through focus” focal length
Converging Lenses Focal point is the place on the axis where all rays arriving parallel to the axis are directed There is a second focal point on the input side where all rays directed away from it leave parallel to the axis “In through focus-out parallel” “In parallel-out through focus” focal length focal length

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## This note was uploaded on 12/21/2010 for the course PHYS Physics 21 taught by Professor Larrywatson during the Spring '08 term at North Dakota.

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02_05_Lenses - Today 2/5 o o o o Images and Lenses Lab Any...

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