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Which of the following statements about electromagnetic radiation is true? A.) It always travels at 3×108...

Which of the following statements about electromagnetic radiation is true?

A.) It always travels at 3×108 m/s.

B.) It consists of perpendicularly oscillating electric and magnetic fields, and the direction of propagation is perpendicular to both.

C.) It consists of oscillating electric and magnetic fields that are parallel to one another and perpendicular to the direction of propagation.

D.)The oscillating electric and magnetic fields are completely out of phase with one another

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Answer #1
The electromagnetic radiation consists of electromagnetic waves. In electromagnetic waves, the electric field oscillate perpendicular to the oscillation of magnetic field and the wave is propagating in the direction perpendicular to both the fields i.e, electric and magnetic field. The electromagnetic wave travels with the speed of light in vacuum but it varies in medium. Therefore, the correct option is (B).
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