Lesson 3: Wavestown Answer KeyRadio Waves Ray’s TV - TV reception uses radio waves Satellite Dish at Ray’s TV - receives movies via radio waves from a satellite Taxi - Car radio receives radio wave signals Taxi - Driver receives instructions on a CB radio which uses radio waves Radio Tower - broadcast’s radio signals Large Satellite dish in field - receives radio waves from distant stars Microwaves Microwave in Waves Grill - uses microwaves to cook food Disk-like antennas on tower - send microwave communications Infrared Heat lamps above food in Waves Grill - use infrared waves to keep food hot Ray’s TV - Remote controls use infrared waves to communicate with the TV Trees, bushes, grass, and farm - vegetation reflects short infrared waves Observatory - astronomers study thermal infrared (long infrared waves) from stars Visible Light Rainbow - water droplets cause white light to break apart into the colors of the rainbow Photographer’s studio - portrait photographers use film sensitive to visible light Observatory - astronomers look at visible light from planets and stars Ultraviolet Tanning Salon - use ultraviolet waves to tan our skin sunglasses store - sunglasses protect our eyes from the ultraviolet waves Suntan lotion - protects our skin from ultraviolet waves Observatory - astronomers see some ultraviolet radiation from planets and stars X-rays Dr.Bob’s Health Clinic - uses x-rays to study our bones High energy x-rays are also used to treat cancer Gamma Rays Dr.Bob’s Health Clinic - gamma radiation is used to kill sick cells through nuclear medicine Gamma radiation is given off by nuclear explosions that occur within stars, like our sun. Note: Stars give off gamma rays and x-rays. These EM waves cannot penetrate the Earth's atmosphere, therefore they cannot be seen by telescopes on Earth. |
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