9. Diffraction refers to a. the bending of a wave around a corner b. the monochromatic nature of light c. the separation of white light into the visible spectrum d. the bending of light when it changes medians 10. A passenger on a Ferris wheel of diameter 22 m makes one complete revolution every 45 s. What is the passenger's centripetal acceleration? a. 19 m/s- b. 13 m/s- c. 0.43 m/s- d. 0.21 m/s- e. 0.068 m/s- Justify your answer: Thinking and Inquiry (20 marks) 11. A 57-g tennis ball travelling at 28 m/s is hit straight back with the same velocity. Determine the average force on the tennis ball if the racket is in contact with the ball for 4:9 ms. (2 marks) of the poo