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19 Cards in this Set
- Front
- Back
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It is also known as electromagnetic radiation. It is a wave that is created as a result of vibrations between an electric field and magnetic field. |
EM wave |
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It can travel through anything even on vacuum (space), meaning it does not need any medium to travel. It can travel in a vacuum at a speed of light (3x108 m/s). |
EM wave |
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These have the longest wavelengths and contain the least energy in the EM spectrum. They are produced by making electrons vibrate in an antenna. They are used to transmit sound and picture information over long distances. |
Radio waves |
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These have smaller wavelengths than radio waves. They are used in satellite communications, radar, and cooking. |
Microwaves |
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These are part of the EM spectrum that is invisible to human eyes but we can detect it as heat. |
Infrared waves |
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These are the only wavelengths of the EM spectrum that humans can see. The different wavelengths of visible light are seen as the colors of the rainbow: red, orange, yellow, green, blue, indigo, and violet. |
Visible light waves |
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These have a shorter wavelength than visible light. Although UV waves are invisible to the human eye, some insects, such as bumblebees, can see them. |
Ultraviolet waves |
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These have much higher energy and much shorter wavelengths than ultraviolet. |
X-ray waves |
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These lie at the other end of the electromagnetic spectrum. They are shortest in wavelength and highest in frequency. They carry the highest amount of energy, thus they are more dangerous. |
Gamma ray waves |
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These are waves that are created as a result of vibrations between an electric field and magnetic field. |
Electromagnetic wave |
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Which two colors of light lie at the beginning and end of the visible spectrum? |
Red and violet |
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Which of the following electromagnetic waves has the LEAST wavelength range? |
Gamma rays |
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Which among the following electromagnetic waves has the LONGEST wavelength? |
Radio waves |
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Which of the following is correctly arranged from HIGHEST to LOWEST energy? |
Ultraviolet, visible light, radio wave |
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Gamma rays are used to treat cancer through the process called |
Radiotherapy |
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Ultraviolet radiation in sunlight produces vitamin C in the skin and gives us tanning effect. |
False (vitamin D) |
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These are the only wavelengths of the EM spectrum that humans can see. |
Visible light waves |
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There are five different types of EM waves |
False (seven) |
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They are arranged in a gradual progression from the waves of lowest frequency to highest frequency. This arrangement of EM waves is called |
Electromagnetic spectrum |
