Parallel light rays from a distance object fall on a concave lens. The image of the object is located 12.5 cm in front of the lens, what is the power of the lens? a. b. C. d. e. C. d. -12.00 -8.00 +8.00 +12.00 -4.00 +0.50 D lens +0.25 D lens

Which of the following scenarios does NOT result in refraction? a. The light must enter the medium parallel to the normal. b. Both the incident and refracting media must be transparent. C. The light must enter the medium at an angle > 0° with respect to the normal. d. Both substances must have different indices of refraction

Which of the following is not a problem for refracting telescopes? O A. Different wavelengths of light are focused at slightly different locations. O B. The quality of the glass lens in transparency and in the shape of both surfaces must be high. C. The secondary mirror blocks some of the light passing through the primary lens. D. The primary lens can only be supported at the edges making deformation of large lenses difficult to avoid.

w9-8 A diverging lens has a focal length of −8.00 cm.  What is the nature of the image formed when the object is placed at a distance of 24.2 cm from the lens? a. virtual, upright, and diminished b. real, inverted, and diminished c. virtual, upright, and enlarged d. real, inverted, and enlarged