Certainly! The speed of light in a vacuum, denoted by the symbol "c," is approximately 299,792,458 meters per second (m/s). This is a fundamental constant in physics.
The formula to calculate the speed of light is:
c = λ * f
Where: c = Speed of light in meters per second (m/s) λ (Lambda) = Wavelength of light in meters (m) f = Frequency of light in Hertz (Hz)
To measure the speed of light, you need to know either the wavelength (λ) and frequency (f) of the light being considered or use experimental data.
One of the most accurate historical methods used to measure the speed of light involved determining the wavelength of light from a known source and its corresponding frequency. Nowadays, advanced techniques like laser interferometry are used to measure the speed of light with very high precision.
Keep in mind that the speed of light is constant in a vacuum, but it can slow down when passing through different materials due to the effect of refraction. However, when we talk about the "speed of light," we usually refer to its speed in a vacuum, which is the fundamental constant in nature.