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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Big Sean net worth: $12 Million. Big Sean net worth and salary: Big Sean is an American rapper who has a net worth of $12 million. Big Sean was born Sean Michael Leonard Anderson on March 25, 1988 in Santa Monica, California. He was raised in Detroit by his mother and grandmother.