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Answer:
1.Electromagnetic waves are created by oscillating charges (which radiate whenever accelerated) and have the same frequency as the oscillation
2.all electromagnetic radiation travels at the same speed which is about 3.0 * 108 meters per second through a vacuum. We call this the "speed of light"
3. Radio wave
Radio wave microwave
Radio wave microwave infrared optical
Radio wave microwave infrared optical ultraviolet
Radio wave microwave infrared optical ultraviolet x-ray
Radio wave microwave infrared optical ultraviolet x-ray gamma - rays