Electromagnetic Spectrum
Flashcard
•
Science
•
8th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the electromagnetic spectrum?
Back
The electromagnetic spectrum is the range of all types of electromagnetic radiation, which includes radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.
2.
FLASHCARD QUESTION
Front
What is the relationship between wavelength and frequency?
Back
As the wavelength of a wave increases, its frequency decreases, and vice versa. This means that longer wavelengths correspond to lower frequencies and lower energy.
3.
FLASHCARD QUESTION
Front
What are electromagnetic waves?
Back
Electromagnetic waves are waves that consist of electric and magnetic fields oscillating perpendicular to each other and to the direction of wave propagation. They can travel through empty space.
4.
FLASHCARD QUESTION
Front
What type of electromagnetic waves are used in broadcasting?
Back
Radio waves are used in broadcasting for transmitting audio and video signals.
5.
FLASHCARD QUESTION
Front
What are ultraviolet rays?
Back
Ultraviolet rays are a type of electromagnetic radiation that can help the body produce vitamin D and are found just beyond the visible light spectrum.
6.
FLASHCARD QUESTION
Front
How do electromagnetic waves differ from mechanical waves?
Back
Electromagnetic waves do not require a medium to travel through, while mechanical waves need a medium (like air, water, or solids) to propagate.
7.
FLASHCARD QUESTION
Front
What is the speed of electromagnetic waves in a vacuum?
Back
The speed of electromagnetic waves in a vacuum is approximately 299,792 kilometers per second (or about 300,000 kilometers per second).
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