Part A We divide the electromagnetic spectrum into six major categories of

Part a we divide the electromagnetic spectrum into

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Part AWe divide the electromagnetic spectrum into six major categories of light, listed below. Rank these forms of light from left to right in order of increasingwavelength. To rank items as equivalent, overlap them. Hint 1. The wavelength of radio waves Any light wave with a wavelength longer than 1 is considered a radio wave. This fact should help you place radio waves correctly in Part A.
Correct Notice that these wavelengths span an enormous range. The wavelengths of gamma rays can be smaller than the size of an atomic nucleus, while the wavelengths of radio waves can be many meters (or even kilometers) long. Visible light spans only a very narrow range of wavelengths, from about 400 at the blue (violet) end to about 700 at the red end. Part B Rank the forms of light from left to right in order of increasing frequency . To rank items as equivalent, overlap them. Hint 1. What is the mathematical relationship between frequency and wavelength? Help Reset nanometers nanometers × the longer the wavelength, the higher the frequency the longer the wavelength, the lower the frequency gamma rays X rays ultraviolet visible light infrared radio waves Longest wavelength Shortest wavelength
Correct Notice that the frequency order is the opposite of the wavelength order from Part A. You can understand why if you recall that wavelength times frequency always equals the speed of light. Because the speed of light is a constant, longer wavelengths must mean lower frequencies, and vice versa. Part C Rank the forms of light from left to right in order of increasing energy . To rank items as equivalent, overlap them. Hint 1. What is the mathematical relationship between frequency and energy? Help Reset × the higher the frequency, the higher the energy energy depends on both frequency and the speed of light the higher the frequency, the lower the energy radio waves infrared visible light ultraviolet X rays gamma rays Highest frequency Lowest frequency
Correct Notice that the energy order is the same as the frequency order from Part B, which means it is opposite the wavelength order from Part A. The reason is that the energy of a photon of light is proportional to its frequency: energy = Planck's constant frequency Part D Rank the forms of light from left to right in order of increasing speed . To rank items as equivalent, overlap them.

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