Lenses, image formation and the eye

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By the end you’ll be able to

describe the action of converging and diverging lenses on parallel rays and relate lens shape to image formation
draw and interpret ray diagrams for converging lenses to determine whether images are real or virtual, upright or inverted, and magnified or diminished
describe the images formed by a diverging lens as virtual, upright and diminished

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identify the main parts of the eye and explain the roles of the cornea, lens, retina, iris, ciliary muscles and optic nerve

explain short sight and long sight and describe how converging or diverging lenses correct these defects

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