GENERAL PHYSICS 2

Please answer items no. 1-25 given below. Please provide the best and original answers with brief but effective explanations.

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General Physics 2 Multiple Choice. Direction: Choose the letter of the best/correct answer. Blacken the circle (0) on the answer sheet which 1. Which wave can propagate even in a vacuum? a. Electromagnetic wave c. mechanical wave b. longitudinal wave d. transverse wave 2. Which wave is used in wireless communication technologies such as Bluetooth? a. Infrared b. microwave c. radio wave d. ultraviolet ray 3. Which of the following has the longest wavelength? a. Infrared b. microwave c. ultraviolet ray d. visible light wave 4. At what angle of incidence is the reected ray completely polarized? a. Brewster's angle b. critical angle c. 90 0 d. 0 5. At what angle of incidence is the angle of refraction equal to 90 0? a. Brewster's angle b. critical angle c. 90 0 d. 0 For items 6-8, light passes through two media as shown in the gure on the right. air 6. The ray of light emerging from medium B will be parallel to . a. Normal b. ray 1 c. ray 2 d. ray 3 7. When light passes from air to medium A, it . a. Speeds up c. is internally reected b.slows down d. is linearly polarized 8. Which has/have the greatest index of refraction? a. Air b. medium A c. medium B d. mediums A and B 9. The dispersion of white light into its component colors by a prism is due to a. Polarization of light b. total internal reflection c. the decrease in the speed of light in the prism d. the variation among the indices of refraction of the colors of light 10. Unpolarized light passes through a polarizer-analyzer combination. What must be the angle between the transmission axis of a polarizer and analyzer of the intensity of the transmitted light to be 0.25 of its original value? a. 0 b. 30\" c. 45\" d. 90\" For items 11 to 12, consider a ray of light from air incident on a material at its Brewster's angle of 60. 11. What is the index of refraction of the material? a. 0.5 b. 0.367 c. 1.732 d. 2.0 12. What is the angle of refraction? a. 300 b. 45\" c. 60\" d. 90\" For items 13 to 14, consider the situation: A boy is standing 1.2 m in front of a plane mirror. His dog is 0.5 m directly in front of him. 13. How far is the boy from his image? a. 1.2 m b. 2.4 m c. 1.9 m d. 1.0 m 14. How far is the image of the dog from the boy a. 1.2 m b. 2.4 m c. 1.9 m d. 1.0 m For items 15-17, consider the following situation: An object is placed in front of a concave spherical mirror as shown in the gure. Rays 1, 2, and 3 leave the top of the object and, after reflection, converge at a point on top of the image. Ray 1 is parallel to the principal axis, ray 2 passes through F, and ray 3 passes through C. 15. Which will pass through F after reection? a. Ray 1 only b. ray 2 only c. ray 3 only d. rays 1 and 2 16. Which will reect back from the mirror surface? a. Ray 1 only b. ray 2 only c. ray 3 only d. rays 1 and 2 17. Which of the following best describes the image that will be formed by the mirror? a. Real, inverted, reduced c. real, upright, enlarged b. Real, inverted, enlarged :1. Virtual, upright, enlarged 18. A man, who is 6.0 ft tall, stands in front of a plane mirror. What is the shortest plane mirror that he can use to see his full-sized image? a. 2.0 ft b. 2.5 ft c. 3.0 ft d. 6.0 ft 19. Which of the following refers to the center of a mirror? a. Aperture b. center of curvature c. radius of curvature d. vertex 20. A ball is held 50.0 cm in front of a plane mirror. The distance between the ball and its image is . a. 25 cm b. 50 cm c. 75 cm d. 100 cm For items 21 and 22, consider a 10 cm tall object placed 60 cm from a concave mirror with a focal length of 40 cm 21. The distance of the image form the mirror is . a. 24 cm b. 83 cm c. 100 cm d. 120 cm 22. The sized of the image is a. 10 cm b. 14 cm 'c. 20 cm d. 50 cm 23. The eye focuses by . a. Moving the lens c. moving both the lens and the retina b. Moving the retina d. changing the focal length of the lens 24. A nearsighted person has a far point of 33 cm. what focal length of a contact lens would allow the person to see at a distance? a. -67 cm b. 33 cm c. 33 cm d. 67 cm 25. A farsighted person cannot clearly see objects closer than 2.0 m. what power of contact lenses would correct this near point to 25 cm. a. -0.5 D b. 0.5 D c. 2.0 D d. 3.5 D _'._