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Electromagnetic spectrum
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Which type of waves are used in broadcasting?
Radio waves
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Which has the LONGEST wavelength and, therefore, the lowest frequency/energy
Radio waves
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The distance between two crests or two troughs of a wave is called:
wavelength
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True or false: as you move along the spectrum, radio to gamma waves, the wavelengths decrease in size (get smaller)
True
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As the frequency of an electromagnetic wave increases, the amount of energy in that wave...
increases
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What are the units of frequency?
Herz (Hz)
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Which of the following electromagnetic waves has the lowest energy? Gamma rays, Infrared waves, Visible light, microwaves
Microwaves
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Which of the following electromagnetic waves is given off as heat?
Infrared waves
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Calculate the wavelength of light that has a frequency of 5.2 x 10^12 1/s.
5.8 x 10^-5 m
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Which has the LONGEST wavelength and, therefore, the lowest frequency/energy?
Radio waves
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Airport security is an example of ________________.
X-rays
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Which section of the spectrum is the ONLY one we can see?
Visible light
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How much of the electromagnetic spectrum is visible?
only a small part
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A wave with a large wavelength will have a ______ frequency and _____ energy
low, low
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The speed of light (radiation) is _________km/second.
300,000
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Which electromagnetic waves are used in ovens and cell phone communications?
Microwaves
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Electromagnetic waves that help your body produce vitamin D are called?
Ultraviolet waves
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A wave has a frequency of 10 hz and a wavelength of 4 m. What is the velocity of the wave?
40 m/s
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How are electromagnetic waves different from other waves?
They can travel through empty space
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Mention the correct order of waves on the EMS from the longest wavelength to the shortest wavelength
Radio, Micro, Infra, Visible, Ultra, X-ray, Gamma
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High frequency waves have _________ wavelengths.
short
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Which electromagnetic waves are used in devices such as heat lamps & TV remote controls?
Infrared rays
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