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OpenStudy (anonymous):
1. An electromagnetic wave in a vacuum has a wavelength of 0.07 m. What is its frequency? (1 point) f = 3.0 • 108 m/s f = 4.3 • 109 Hz f = 3.0 • 109 Hz f = 4.3 • 108 m/s 2. Which of the following occurs as light travels farther from its source? (1 point) Far from the source, photons come together in a small area. The intensity of light increases as photons move away from the source. The source gives off less light as photons move away from it. Far from the source, photons spread over a larger area. 3. Infrared rays have a shorter wavelength than (1 point) ultraviolet rays.
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OpenStudy (anonymous):
1. f = 4.3 • 109 Hz 2. Far from the source, photons spread over a larger area. 3. radar waves. :)
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