The statement that a photon does not experience time is often used to describe the behavior of light in certain contexts, particularly in the theory of relativity. However, it's important to note that this statement is a simplification and should not be taken too literally.
In physics, the concept of time is closely intertwined with the concept of causality. Photons, as massless particles, travel at the speed of light in a vacuum and are not subject to the usual effects of time dilation experienced by massive objects. From the perspective of a photon, its journey from emission to absorption occurs instantaneously. This means that, in a sense, time "stands still" for a photon.
However, this does not mean that light itself does not have characteristics such as wavelength and frequency. Wavelength and frequency are properties of electromagnetic waves, and light is an example of an electromagnetic wave. These properties are determined by the oscillating electric and magnetic fields that make up the wave.
Wavelength is the distance between two consecutive points of a wave that are in phase, such as the distance between two adjacent peaks or troughs. Frequency, on the other hand, is the number of complete oscillations (cycles) of the wave that occur per unit of time. The relationship between wavelength and frequency is given by the equation:
c = λ * ν,
where c is the speed of light, λ is the wavelength, and ν is the frequency. This equation holds true for all electromagnetic waves, including light.
So, while the concept of time may be different for a photon compared to massive objects, it does not negate the existence of wavelength and frequency for electromagnetic waves such as light.