A concave lens is thinner at the centre than at the edges. Concave lenses are thinner at the middle. Rays of light that pass through the lens are spread out (they diverge). A concave lens is a diverging lens. When parallel rays of light pass through a concave lens the refracted rays diverge so that they appear to come from one point called the principal focus. The distance between the principal focus and the centre of the lens is called the focal length.
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Is Big Sean Currently in a Relationship? Since early 2016, the rapper has been together with Jhene Aiko. Big Seanâs Girlfriends. Previously, Big Sean had been engaged to Naya Riveras. In the past, he had also dated Ashley Marie and Ariana Grande. Mother. Myra Anderson. Father. James Anderson. Sisters. As far as we know, Big Sean does not have any sisters.