answer the following physics questions

Consider the diagram below. Based on your understanding of refraction, which of the following statements is correct? medium 1 medium 2 medium 3 (V2 > V 1 > V3 ( V2 > V 3 > V1 v1 > V 3 > V2 ( V 3 > V 1 > V2An object is placed 50 cm from a lens with a power of 2.0 D. The image has which of the following characteristics? 0 smaller, upright and imaginary 0 larger, upright and imaginary 0 larger, inverted and real 0 no image forms Below are pairs of radii for thin lenses. Which of the following pairs would result in the formation of a virtual image when an object is placed 100 cm from the lens? (the lens has an index of refraction of 1.5) Or1 = 20 cm and r2 = -20 cm Or1= -20 cm and r2 = -10 cm Or1 = 20 cm and r2 = 40 cm Or1 = 40 cm and r2 = 20 cm