light bulb D. study table lamp 6. A transparent material that transmits visible, ultraviolet, and infrared light. A. flashlight B. laser C. optical fiber travels different speed through different media. B. reflection C. sound wave D. fluorescent light 7. A D. all of these options A. vibration 8. As it travels, sound wave is created in response to a vibration and how easily they move back to their A. opposite direction B. new position 9. When the sound travels through solids, the vibration of the particles move C. wavy position D. original position A. slowly C. irregularly ? B. moderately 10. How do sound travels through air? D. fast B. very fast C. in jumping motion D. moderately A. very slowly 11. The throwing back by a body or surface of light, heat, or sound without absorbing it. C. Reflection A. Light path B. Refraction D. All of these options 12. Which material does not reflect light? B. mirror C. shiny metals A. water D. shadow 13. When you throw a ball straight down on the smooth surface, it will bounce C. diagonally D. straight A. on the other side B. opposite 14. The bending of light is called. A. Light path B. Reflection 15. When somebody faces a mirror, his reflection can be seen in a reversed manner. A. No B. Yes C. Refraction D. All of these options C.Maybe D.All of these options 16. Loud sound also means A. intense sound B. soff sound C. cracking sound D. mellow sound 17. The softness or loudness A. pitch C.sound D. echo 18. Which of the following A. drum set of sound is called B. volume produces a soft sound? B.jet C. buzzing bee produces the loudest sound? B. whisper D. train 19. Which of the following A. cry of a baby C. telephone D. bomb back at you.​