Optics and Lens - OpticsandLens ToobaKhan Contents Optics...

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Optics and Lens Tooba Khan
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Contents Optics Lens Types of lenses Ray diagrams Of a converging lens Of a diverging lens
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Optics
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Optics The optical centre of the lens is located at its geometric centre. The principal axis is a construction line drawn perpendicular to the lens, through the optical centre. Rays parallel to the principal axis will converge when passing through a converging lens, and diverge when passing through a diverging lens. The focal length is the distance between the principal focus and the optical centre of the lens. The focal plane is an imaginary plane perpendicular to the principal axis at the focal point. Parallel rays will converge through a converging lens somewhere
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The principal focus (F) is a point on the principal axis where light comes to a focus (for a converging lens) or appears to be diverging from (for a diverging lens). Two foci exist, equidistant on either side of the lens, since light behaves the same way when
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Optics and Lens - OpticsandLens ToobaKhan Contents Optics...

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