Question

Electromagnetic waves travel through space at a speed of _____.

a. 3,000,000 kilometers per second
b. 3,000 kilometers per second
c. 300,000 kilometers per second
d. 30,000 kilometers per second

Answer 1

The answer is C 300,000 kilometers per second

Answer 2

Ans: C) 300,000 kilometers per second

Electromagnetic waves are created by the movement of charges. This results in the generation of electric and magnetic fields which oscillate in a direction perpendicular to each other.

Electromagnetic waves carry a certain wavelength, frequency and speed. The speed of such waves as they travel through space is equal to the speed of light (c) = 3*10⁸ m/s

since 1 km = 10³ m

speed, c = 1 km * 3*10⁸ ms-1/10³ m

= 300, 000 km/s