In a scene from a movie, a nearsighted character removes his eyeglasses and uses them to focus the nearly parallel rays of the sun to start a fire. What is physically wrong with this scene? O Parallel rays cannot be focused. O Sunlight cannot be used to start a fire. O The eyeglasses have converging lenses and cannot be used to focus parallel rays. O The eyeglasses have diverging lenses and cannot be used to focus parallel rays. A fire can only be started if the image is virtual. Blue light with a wavelength of 425 nm passes from a vacuum into a glass lens; and the index of refraction is found to be 1.65. The glass lens is replaced with a plastic lens. The index of refraction for the plastic lens is 1.54. In which one of the two lenses does the light have the greatest speed and what is that speed? O glass, 1.82 x 108 m/s O plastic, 2.13 108 m/s O The speed of the blue light is the same in the vacuum and both lenses; and it is 2.99 x 108 m/s O glass, 2.28 x 108 m/s O plastic, 1.95 108 m/s Complete the following sentence: The term coherence relates to O the frequency of two waves. O the phase relationship between two waves. O the polarization state of two waves. the amplitude of two waves. O the diffraction of two waves. The figure shows the interference pattern obtained in a double-slit experiment using light of wavelength 600 nm. Central bright fringe A B C D E Which fringe is the same distance from both slits? O A OB