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In a ray diagram, a concave lens is drawn as a vertical line with inward facing arrows to indicate the shape of the lens. Learn about and revise lenses, images, magnification and absorption ...
Graphs for convex and concave lenses (Real is positive sign convention) Figure 1 shows a graph where the reciprocal of the image distance is plotted against the reciprocal of the object distance. The graph is a straight line that intercepts both axes at 1/f where f is the focal length of the lens.
ray diagram. : Draw a ray from the object to the lens that is parallel to the principal axis. Once through the lens, the ray should pass through the principal focus. Draw a ray which passes from...
Feb 27, 2024 · In a convex lens, parallel rays of light are brought to a focus. This point is called the principal focus. This lens is sometimes referred to as a converging lens. The distance from the lens to the principal focus is called the focal length. This depends on how curved the lens is.
Sep 9, 2023 · Ways to Remember. Concave: Think “Con-cave”; it has a “cave” or an inward dip. Convex: Think of “Con-vex” as “convicts” trying to escape, bulging outwards. Concave and Convex Lenses. Concave lenses focus light inside the curve of the lens, while convex lenses focus light using the outer curve.
ray diagram. : Draw a ray from the object to the lens that is parallel to the principal axis. Once through the lens, the ray should pass through the principal focus. Draw a ray which passes from...
Concave lenses are thicker at the edges and thinner in the centre. They cause light to diverge, meaning spread out. The principal focus of a concave lens is the point where rays hitting the lens parallel to the axis appear to have come from.
