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