How is fraunhofer diffraction different from fresnel diffraction? A. Fraunhofer diffraction does not involve a point source of light
B. Fraunhofer diffraction involves no more than two wave sources
C. Fraunhofer diffraction involves parallel rays of light between the source, obstacle , and screen
D. Fraunhofer diffraction results in a continuous distribution of wavelets across an area

Afisherman notices that his boat is moving up and down periodically, owing to waves on the surface of the water. it takes a time of 2.70 s for the boat to travel from its highest point to its lowest, a total distance of 0.700 m. the fisherman sees that the wave crests are spaced a horizontal distance of 6.50 m apart. a. how fast are the waves traveling? b. what is the amplitude a of each wave?