6. What is the power of a spherical curved surface that separates air from Tital glass (n=1.7) and has a radius of 466mm? a. -1.25D b. +2.25D C. -0.75D d. +1.50D 7. When object faces a concave surface, radius of curvature of the surface is positive. a. True . False 8. What represents the point F' seen in the below image? a. surface center of curvature b. the primary focal point C . the secondary focal point d. the image location 9. Which one of the following statements about REAL IMAGES is not correct? a. Images are formed by converging light rays b. Images can be captured on a screen c. Images orientation is erect d. Images formed can be equal in size with the object size 0. What type of surface is seen in the image below and what power has this surface if made of glass (n=1.523) with a radius curvature of 200mm? n =1 n'=1.523 a. Converging, F = -1.50D b. Diverging, F= +1.25D c. Converging, F= +3.12D c. Diverging, F= -2.62D