ed before the number. Write the letter of the correct answer in the 1. What EM wave make cellular telephones transmit and receive signals? A. radio waves B. microwaves C. visible light D. gamma rays 2. Which type of X-ray can penetrate even through metals? A. regular X-ray C. short wavelength X-ray B. long wavelength X-ray D. dental X-ray 3. What type of electromagnetic waves is used in RADAR? A. infrared rays B. radio waves C. microwaves D. ultraviolet rays 4. What imaging technique uses powerful magnets, computer and radio waves to make detailed pictures inside your body? A. thermal imaging C. Magnetic Resonance Imaging (MRI) B. infrared imaging D. X-ray image 5. In an infrared camera, what color indicates warmer temperature? A. blue B. violet C. green D. yellow 6. Which kind of wave causes the fluorescent chemicals to glow in sunlight? A. microwave B. gamma ray C. ultraviolet D. visible light 7. How many of the EM waves are visible? A. none out of seven EM waves C. all of the EM waves B. most of it D. only one out of seven EM waves 8. Among the following forms of the EM spectrum, which waves do not have enough energies to damage the body cells? C. gamma ray and ultraviolet A. gamma ray and infrared D. X-ray and ultraviolet B. B. radio wave and visible light 9. What kind of wave is very dangerous, but have been used to kill cancer cells? C. infrared D. visible light B. radio waves A. gamma rays 10. Which of the following sets of EM radiation can harm your body cells? C. infrared, microwaves, ultraviolet A. gamma ray, ultraviolet ray, X-ray B. light, ultraviolet, X-ray D. gamma ray, microwaves, infrared​