Parallel rays from a distant object are traveling in air and then are incident on the concave end of a glass rod, which has a radius of curvature of magnitude 15.0 cm. The refractive index of the glass is 1.50. The image formed by refraction at the concave surface of the rod is located
(a) 5.0 cm to the left of the vertex of the curved surface
(b) 5.0 cm to the right of the vertex of the curved surface
(c) 7.5 cm to the left of the vertex of the curved surface
(d) 7.5 cm to the right of the vertex of the curved surface
(e) 45.0 cm to the left of the vertex of the curved surface
(f) 45.0 cm to the right of the vertex of the curved surface
(g) none of the above answers
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