<Tr> <Th> S = F (\ displaystyle S = F) (Object at focal point) </Th> <Td> <Ul> <Li> Reflected rays are parallel and never meet, so no image is formed . </Li> <Li> In the limit where S approaches F, the image distance approaches infinity, and the image can be either real or virtual and either upright or inverted depending on whether S approaches F from above or below . </Li> </Ul> </Td> <Td> </Td> </Tr> <Ul> <Li> Reflected rays are parallel and never meet, so no image is formed . </Li> <Li> In the limit where S approaches F, the image distance approaches infinity, and the image can be either real or virtual and either upright or inverted depending on whether S approaches F from above or below . </Li> </Ul> <Li> Reflected rays are parallel and never meet, so no image is formed . </Li> <Li> In the limit where S approaches F, the image distance approaches infinity, and the image can be either real or virtual and either upright or inverted depending on whether S approaches F from above or below . </Li>

Uses and application of concave and convex mirror