Low frequency radio waves have a frequency of 30 kHz (30,000 Hz) and a wavelengt
ID: 1433457 • Letter: L
Question
Low frequency radio waves have a frequency of 30 kHz (30,000 Hz) and a wavelength of 10km (10,000 m) what is the speed of these waves? (Use commas in your answer)
Infrared waves have a wavelength of 3 THz (300,000,000,000 Hz or 3x1012 Hz) and a wavelength of 100 m (.0001 m or 10-4m) what is the speed of these waves. (Use commas in your answer)
Gamma rays have a frequency of 3 EHz (3,000,000,000,000,000,000 Hz or 3x1018 Hz) and a wavelength of 1 pm (.0000000000001 m or 10-12 m). What is the speed of a gamma wave? (Use commas in ytour answer)
(Question) Based on the answers the the 3 previous questions what is the speed of all EM Waves in a vacuum?
Explanation / Answer
Speed of radio wave = wavelength * frequency = 10 km * 30 KHz = 10,000 m * 30,000 Hz = 3,00,000,000 m/s = speed of light
Speed of Infrared wave = wavelength * frequency = 0.0001 m * 3 THz = 0.0001 m * (300,000,000,000 Hz) = 3,00,000,000 m/s = speed of light
Speed of Gamma wave = wavelength * frequency = 1 pm * 3 EHz = (0.0000000000001 m) * (3,000,000,000,000,000,000 Hz) = 3,00,000,000 m/s = speed of light
speed of all EM Waves in a vacuum = speed of light = 3,00,000,000 m/s
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