Electromagnetic Waves
Electromagnetic waves travel through space.
What is 300,000 km/s or the speed of light
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How long can radio waves be ?
a kilometer or more.
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What can pass through many building yet don't carry enough energy to harm humans ?
Radio waves.
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What converts invisible infrared waves ?
Infrared imaging.
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What waves are very useful but also very dangerous ?
Ultraviolet waves.
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The energy that is also known as electromagnetic radiation.
What is radiant energy.
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What is the electromagnetic spectrum organized into ?
Wavelengths and frequencies.
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What uses electromagnetic waves to send information in all directions ?
Broadcasting.
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What do vibrating molecules do ?
Emit infrared waves.
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Who might use ultraviolet waves to kill germs?
Doctors, Campers.
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What is the source that provides most of Earths energy?
The sun.
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What low energy electromagnetic waves has a wavelength between 1 mm and 30 cm ?
Microwave.
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Do radio waves travel through air at the same speed as all electromagnetic waves ?
Yes.
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What do homes, traffic signals, movie theaters, and televisions rely on ?
Light.
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What can be dangerous because they pass through your upper layer of skin?
X-rays
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What other field is an electric field part of ?
Force field.
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What electromagnetic wave has a higher frequency of light and carries enough energy to cause chemical reactions ?
Ultraviolet waves.
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What is the change in the amplitude or the frequency of a carrier wave ?
Frequency modulation. (FM).
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What is the world wide system that uses satellite signals.
Global Positioning System. (GPS).
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Who uses an ultraviolet light to harden adhesive?
Dentist.
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What two fields have scientist found that are related ?
Electric and Magnetic fields.
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What high energy electromagnetic wave has a higher frequency than all other waves ?
Gamma rays.
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What waves typically have higher frequency and more energy than (AM) waves ?
(FM) waves.
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What do scientist do when they launch satellites that detect and photograph infrared waves coming from earth ?
Image earth.
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What is one of the main objects that uses ultraviolet waves in security scans when going on a plane?
Luggage.
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