_ 35. Some uses for infrared waves include microwaves, sonar, cell phones, and television remote control devices. 42. Which of the following statements would demonstrate that the Doppler effect has occurred? A. True B. False A. A higher pitch is detected than is beir mitted by a sound source. B. A change in pitch is detected because a sound source is increasing in volume. 36. Why would a straw in a glass of water give the illusion of being broken? C. Echoes are created A. the reflection of the light on the water's surface masks the part under water . B. the refraction of the light waves coming from the part of the straw that is 43. The speed of electromagnetic waves in space is the same as the speed of underwater makes it appear to be in a different location. light in space. C. diffraction of the light waves causes your brain to misinterpret what you A. True are seeing B. False 37. Ultraviolet waves can cause all of the following except 44. The back of a shiny silver spoon forms a convex mirror. A. cancer . A. True B. sunburn B . False C. friction. 45. If a person is talking to you with sound waves that have a wavelength of 0.019 38. Translucent materials only absorb or reflect light but do not allow it to pass meters and a frequency of 18,000 Hz, what would you calculate as the speed through. of that sound? (wavelength x frequency = speed) A. True A. 950,000 m/s B. False B. 1.1 x 106 m/s C. 342 m/s 39. If you were at a concert and you move farther away from the stage, which of the following would be true? 46. The amplitude of a sound wave is most closely related to the _ A. The decibel value would increase. that sound. B. More energy would reach your ears each second C. The sound waves would spread out over a greater area. A. pitch B. loudness C. wavelength 40. When an obstacle is roughly the same size as or smaller than the wavelength of a wave, the wavelength bends around it. This is called A. diffraction 47. Waves with differing amplitudes can best be described by which of the B. refraction. following statements? C. reflection. A. Waves with different amplitudes have different energies B. Waves with different amplitudes have the same amount of energy. 41. Seismic waves are only longi and they travel beneath the Earth's C. Waves with different amplitudes have different wavelengths. crust. A. True 48. As white light passes through a prism and the light appears as a visible B. False rainbow, which of the following phenomena is responsible for this spreading? A. reflection B. diffraction C. refraction 49. When a beam of light is reflected by a plane mirror, A. the angle of reflection must be greater than the incident angle. B. the angle of reflection m cident angle. C. the angle of reflection must be less than the incident angle. 50. X-rays have a higher frequency than visible light. A. True B. False