What is the speed of light?

The speed of light in a vacuum is approximately 299,792 kilometers per second, which is a fundamental constant in physics and plays a crucial role in various fields, including astronomy and relativity. This value represents how fast light travels, and it is essential for understanding many natural phenomena, from the behavior of light waves to the principles underlying the theory of relativity developed by Albert Einstein.

While the options that mention different figures are close, they do not accurately reflect the accepted scientific measurement. For instance, the figure stated in the correct answer is derived from extensive experiments and observations in physics, making it the most precise representation of the speed of light. In contrast, the figures that are below or just approximate are not accurate enough to be considered correct in a scientific context. Thus, B is confirmed as the accurate representation of the speed of light.