The velocity of light in a vacuum, denoted by 'c', is approximately 299,792,458 meters per second (m/s). This value is a fundamental constant in physics and plays a crucial role in many scientific calculations and theories.
While a person can measure the speed of light using appropriate experimental setups and techniques, calculating the velocity of light solely based on fundamental principles or equations is not feasible for an individual without access to advanced laboratory equipment.
Historically, numerous experiments have been conducted to measure the speed of light using various methods, such as timing the round-trip travel time of light pulses or observing the interference patterns in electromagnetic waves. These experiments involve precise measurements and complex instrumentation to achieve accurate results.
Therefore, calculating the velocity of light by a person without relying on pre-existing measurements or experimental data would be challenging or impossible. The accepted value for the speed of light is determined through rigorous scientific research and experimental verification, often performed by teams of experts using sophisticated equipment and methodologies.