There are a number of possible statements that are true.
It is true.
the true answer is light speed
A "fact" is basically anything you can state, especially if such a statement is true. Since you can say "light has a speed", and since that is true, it follows that it's a fact. Light through a "vacuum" is the meaning of "the speed of light." Light through glass is slower.
nothing can move faster than the speed of light in a vacuum APEXXX
Of course not,it is not true. The speed of light decreases
True
to calculate the true speed of the car taking wind speed and direction into account, like a light aircraft (TAS - true air speed)
Yes it is true. If c is the speed of light in air then in water it will be 3/4 of c Hence refractive index of water = speed of light in air/speed of light in water So refractive index = 4/3 = 1.333
Yes. The speed of light in a vacuum (or space) is 3x10^8 m/s. Light will travel slower in any other medium.
True, the speed of light is faster in a transparent medium like water or glass compared to its speed in a vacuum. This difference in speed is due to the different refractive indexes of the medium, which affects the speed at which light travels through it.
In a vacuum, all colors of light travel at the same speed, which is approximately 299,792 kilometers per second (186,282 miles per second). This speed is known as the speed of light and is a universal constant that does not change based on the color of light.
True, since the speed of light is finite.