8/24/2023 0 Comments Reflection images physicsRay diagram for an object viewed through a concave lensįor an object viewed through a concave lens, light rays from the top of the object will be refracted and will diverge on the other side of the lens. Peep holes are set into doors so the occupant can identify a visitor before opening the door. Concave lensesĬoncave lenses always produce images that are: The image cannot be projected onto a screen because it is a virtual image. Only the person using the magnifying glass can see the image. Ray diagram for an object placed less than one focal length from a convex lens Most people have seen images distorted by reflection in curved surfaces, such as the shiny surfaces of cars, cosmetic mirrors, backs and fronts of spoons, and Christmas-tree baubles. This works when the object is placed at a distance less than the focal length. Magnifying glassesĪ magnifying glass is a convex lens used to make an object appear much larger than it actually is. Film must be loaded into the projector upside down so the projected image is the right way up. In a film or data projector, this image is formed on a screen. Ray diagram for an object placed between 2F and F from a convex lens For an object placed between one and two focal lengths from the lens, the image is: Ray diagram for an object placed more than two focal lengths away from a convex lens Projectors For a distant object that is placed more than twice the focal length from the lens, the image is: A camera or human eyeĬameras and eyes contain convex lenses. The type of image formed by a convex lens depends on the lens used and the distance from the object to the lens. Some ray diagrams may also show a third ray. Draw a ray which passes from the object through the centre of the lens.Once through the lens, the ray should pass through the principal focus. Draw a ray from the object to the lens that is parallel to the principal axis.A virtual image appears to come from behind the lens. magnified or diminished (smaller than the object)Ī real image is an image that can be projected onto a screen. ![]() ![]() upright or inverted (upside down compared to the object).
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