Answer the following questions PLEASE MAKE SURE ITS DONE ON PAPER PLEASE

Multiple Choice [1 mark each] 1. Jennie waves the end of a skipping rope up and down 4.0 times every second. What is the period of the waves produced in the rope? a. 0.13 s b. 0.25 s C. 2.0 4.0 s 2. A loudspeaker produces sound waves 3.50 m long at a frequency of 100 Hz. What is the speed of the waves? a. 350 m/s b. 28.6 m/s C. 3.50 m/s d. 0.0350 m/s 3. In the diagram right, which line represents the normal? a. b. C. 4. Under what circumstances does total internal reflection occur? a. Light moves from a faster to a slower medium at less than the critical angle. b. Light moves from a slower to a faster medium at less than the critical angle. C. Light moves from a faster to a slower medium at greater than the critical angle. d. Light moves from a slower to a faster medium at greater than the critical angle. Index of refraction 5. Refer to the table right. In which medium does light travel the fastest? lens of human eye 1.41 a. lens of a human eye quartz crystal 1.46 b. benzene Pyrex glass 1.47 C. diamond d The speed of light is the same in all media. Plexiglas (plastic 1.51 benzene 1.50 Zircon 1.92 famond 2.42 6. A ray of light travels from medium A to medium B. At the surface, part of the ray reflects, and part refracts. When does the refracted ray bend away from the normal line? a. never b. when the index of refraction of medium A is greater than the index of refraction of medium B C. when the index of refraction of medium A is less than the index of refraction of medium B d. when the index of refraction of medium A is equal to the index of refraction of medium B 7. Two waves of the same amplitude and wavelength A meet. They interfere destructively. What is the difference between their wavelengths? a. 0 h C. d. 21 What is the term for the bending of a wave front as it passes an obstacle? a. interference . reflection C. diffraction refraction incident light ray 9. A ray of light travels from air into a soap film on a layer of glass, ay 2 as shown right. Which statement about ray 1 is true? ray 3 a. There is no inversion at either surface. air nair = 1.00 b. There is an inversion the surface between air and soap, but not soap and glass. soap film C. There is no inversion at the surface between air and soap, 1am = 1.35 but there is one at the surface between soap and glass. d. There is an inversion at both surfaces. glass nglass = 1.50 10. Light of wavelength 442 nm is sent through a single slit with a width of 884 nm. At what angle does the first dark fringe occur? a. 30.0 b. 45.0 C. 60.0 d. 90.0 11. Light travels through a single-slit and forms an interference pattern. The spacing of the dark fringes on one side of the pattern is 1.44 cm. What is the width of the central maximum? a. 0.720 cm . 1.44 cm c. 2.88 cm 4.32 cm 12. Red light from a medical helium-neon laser has a wavelength of 633 nm. The laser is aimed into a human eye, and light enters the cornea, index of refraction 1.38, and then strikes the aqueous humour, index of refraction 1.30, and an angle of 14". What is the angle of refraction? [3 marks]13. Violet light of wavelength 400 nm is sent from vacuum into quartz, index of refraction 1.46. What is the wavelength of the light inside the quartz? [2 marks] 14. A thin layer of glycerine, index of refraction 1.6, is applied to a sodium chloride crystal, index of retraction 1.45. A rav of light of wavelength 530 nm travels from air and reflects from the upper and lower surfaces of the thin film. What is the thinnest layer that results in constructive interference between the two reflected rays? [3 marks] an gnocenne mm 15. A double-slit interference experiment is carried out using blue light of wavelength 480 nm. The third bright fringe occurs at an angle of 12". What is the distance between the slits? [2 marks] 16, The distance from the right bisector to a point P on the lourth nodal line in a tworpoint interference pattern is 8 cm. The distance between the sources is 0.65 cm. The distance from the midpoint between the two sources to point P is 15.5 cm. What is the wavelength of the waves? [3 marks] 17. Orange light of wavelength 590 nm is sent through a single slit with a width of 1.5 x 10'5m. what is the angle lor the third bright fringe? [3 marks] Index of 18. What is critical angle if light is travelling from a diamond to quartz crystal? Medium refraction [3 marks] lens of human eye 1.41 quartz crystal 1.46 Pyrex glass 1.47 Plexiglas (plastic) 1.51 benzene 1.50 zircon 1.92 diamond 2.42