Lenses. Type of lenses: Convex lens Convave lens. Refraction Rules for a Converging Lens. Any incident ray traveling parallel to the principal axis of a converging lens will refract through the lens and travel through the focus on the opposite side of the lens.
D (25 cm)Compound Microscope in Normal Adjustment
Image of pollen grain with good resolution (left) and poor resolution (right)
HST’s primary mirror
EyeFunctions of the collimator and the telescope (1)