The speed of an electromagnetic wave traveling through the air will be 2.9 ×10⁸ m/sec.
The refractive index of a substance also known as the refraction index or index of refraction is a dimensionless quantity that specifies how quickly light passes through it in optics.
The refractive index is found as;
[tex]\rm n= \frac{c}{v} \\\\ 1.000293=\frac{3 \times 10^8}{v} \\\\ v=2.9 \times 10^8 \ m/sec[/tex]
Hence, the speed of an electromagnetic wave traveling through the air will be 2.9 ×10⁸ m/sec.
To learn more about the refractive index refer to the link;
https://brainly.com/question/14592350
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