A convex lens is a curved piece of glass or plastic that is thicker in the middle and thinner at the edges. It is used to bend or focus light rays, making objects appear closer and clearer. Full definition
In this lesson, students will be able to explain how convex lenses cause rays of light to converge... (teacherstryscience.org)
Step - by - step description of the different images that can be produced by convex lenses, clearly showing the relevant rays. (tes.com)
Some content has been moved down from Key Stage 4, such as gas exchange in plants, cellular respiration, movement of substances in cells, genetics, resistance as the ratio of potential difference to current, and the use of the ray model to explain imaging in mirrors, the pinhole camera, light refraction, how convex lens focus and the human eye. (educationbusinessuk.net)