Answered

Which of the following BEST describes the electromagnetic spectrum?

A. A continuum of electromagnetic waves
B. A wave which carries both magnetic and electric field
C. A mechanical wave which travels along a medium like air
D. A ray of white light dispersed into a band of rainbow colors.

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Answer:

A.

EXPLANATION:

The electromagnetic spectrum is a continuum of all electromagnetic waves arranged according to frequency and wavelength. The sun, earth, and other bodies radiate electromagnetic energy of varying wavelengths. Electromagnetic energy passes through space at the speed of light in the form of sinusoidal waves.

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