Is it possible that a light wave can measure the speed of an object? — ¿Es posible que una onda de luz pueda medir la velocidad de un objeto?

Is it possible that a light wave can measure the speed of an object?

Under the theory of special relativity, it is not possible for a light wave to “experience” the passage of time or measure the speed of an object directly. According to the theory of relativity, the speed of light is constant for all observers, so a light wave cannot “lead ahead” or “lag behind” to measure the speed of another object.

However, moving objects can affect the light around them so that the relative speed between the light source and the object can be measured. For example, in the Doppler velocity measurement technique, light emitted or reflected by a moving object will experience a change in frequency (and therefore color) as a function of the relative velocity between the object and the observer.

So, although a light wave cannot directly measure the speed of an object, the effects of relative speed can be observed and measured using techniques such as the Doppler effect.

¿Es posible que una onda de luz pueda medir la velocidad de un objeto?