Bellringer Which color of light bends the least and why: red, green, blue
Waves A Review
1. A wavelength of 2 mm and a frequency of 3 Hz has a speed of_____. • 6 mm/s
2. ___ reflection occurs when parallel rays of light hit a smooth surface? A. Diffuse B. Irregular C. Incidental D. Regular
3. If a sound source is moving away from you, you will hear a _____. A. higher freqeuncy B. lower amplitude C. lower pitch D. higher pitch
4. In _____ waves, the particles of the medium move at right angles to the direction in which the wave is traveling. A. compressional B. transverse C. longitudinal D. sound
5. Microwave radiation has a higher frequency than _______. A. visible B. gamma C. radio D. ultraviolet
6. An opaque object has a particular color because it reflects some wavelengths of light and _______ the rest. A. Absorbs B. Reflects C. Transmits D. Echoes
7. As the frequency of a wave traveling at constant speed increases, its _____ decreases. A. energy B. wavelength C. amplitude D. speed
8. _____ mirrors are used on the passenger sides of vehicles to allow for a wider range of view. A. Concave B. Plane C. Convex D. Fun-house
9. Secondary waves CANNOT travel through _____. A. solids B. liquids C. gases D. plasmas
10. Place the colors of light in order from SHORTEST wavelength to LONGEST wavelength. Violet Indigo Blue Green Yellow Orange Red
11. Sound is a disturbance that travels through a medium as a(n) _____ wave. A. polarized B. electromagnetic C. transverse D. longitudinal
12. Waves combine to make a wave with larger amplitude in a process called _____ interference. A. refraction B. destructive C. mirage D. constructive
13. You have recently shown an interest in the inner workings of an electric motor. You wonder exactly how it can go faster when you press the accelerator with your foot. You plan to design an experiment to prove that pressing the accelerator increases the voltage to the electric motor, therefore making it rotate faster. You devise a hypothesis that states that if voltage is increased to the electric motor, then the motor will increase its revolutions per minute. Which 2 of the following factors, in this scenario, would be classified as the controlled variables? the wires the rpms the voltage the motor
14. Because the light rays never meet, a concave lens can produce only a(n) _______ image. A. black & white B. real C. holographic D. virtual
15. List the waves of the Electromagnetic Spectrum from LOWEST frequency to HIGHEST frequency. Radio waves Microwaves Infrared Visible light Ultraviolet X-rays Gamma rays
16. At room temperature, the speed of sound in air is approximately how many m/s? A. 300, 000 km/s B. 343 km/s C. 343 m/s D. 300, 000 m/s
17. The buildup of charges on an object is known as _____? A. positive charge B. static discharge C. negative charge D. static electricity
18. A virtual image always appears _______. A. smaller B. upright C. larger D. upside-down
19. If something vibrates one thousand times per second, it has a frequency of 1 _______. A. GHz B. Hz C. k. Hz D. MHz
20. The colors of visible light with _____ bend less than others when passing through a prism. A. higher amplitudes B. higher frequencies C. longer wavelengths D. shorter wavelengths
21. Ultraviolet rays help your body to produce _______. . A. hair B. vitamin D C. hormones D. calcium
22. Name the type of wave labeled C. A. Ultraviolet B. Visible C. X-ray D. Infrared
23. In which medium listed in the table does sound travel slowest? A. Brick B. Air @ 0°C C. Hardwood C. Air @ 20°C
24. The speed of a wave on a guitar string is 220 m/s and the frequency is 110 Hz. What is the wavelength of the wave? 2 m/s
25. Because of _______, glass prisms separate white light into the visible spectrum of colors. A. reflection B. diffraction C. refraction D. diffusion
26. In a longitudinal wave moving along a spring, areas where the coils are farthest apart are called _____. A. troughs B. compressions C. crests D. rarefactions
27. Match each unit on the left with what it measures on the right. k. Wh Time W Current A Voltage Ω Resistance H Power V Energy
28. A wave bending as it passes a point of land is an example of _____. A. transmission B. reflection C. refraction D. diffraction
29. The unit associated with _____ is the hertz. A. speed B. frequency C. amplitude D. Wavelength
30. Suppose that a reflected light wave has an angle of reflection of 20°. What must be the angle be between the reflecting surface and the original beam of light? A. 30° B. 50° C. 70° D. 90°
31. A tomato will look _______ under blue light? A. white B. blue C. red D. black
32. Of the following, which is the correct speed of light? A. 3 x 108 km/s B. 300, 000 km/s C. 343 m/s D. 3 x 5 10 km/s
33. Which of the following would be classified as quantitative data? 22 nm 300, 000 km/s transparent hot blue 2. 44 GHz
34. Sound waves with frequencies above 20, 000 Hz are too high for humans to hear. This is known as _____. A. ultrasonic B. hypersonic C. infrasonic D. hyposonic
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