Yes, in an electromagnetic wave such as a light ray, the electric and magnetic fields have the same amplitude and frequency. This is a fundamental property of electromagnetic waves.
An electromagnetic wave consists of oscillating electric and magnetic fields that are perpendicular to each other and also perpendicular to the direction of wave propagation. The amplitude of the electric field represents the maximum magnitude of the electric field at any given point in the wave, and the amplitude of the magnetic field represents the maximum magnitude of the magnetic field at that same point.
The frequency of an electromagnetic wave is the number of complete cycles or oscillations it undergoes per unit of time. The frequency determines the color or energy of the light wave. For example, higher frequency electromagnetic waves correspond to shorter wavelengths and higher energy photons (such as ultraviolet or X-rays), while lower frequency waves correspond to longer wavelengths and lower energy photons (such as radio waves).
The relationship between the electric and magnetic fields in an electromagnetic wave is determined by Maxwell's equations, which describe the behavior of electromagnetic fields. These equations dictate that the amplitudes of the electric and magnetic fields are directly related and propagate together through space with the same frequency.
Therefore, in a light ray or any other electromagnetic wave, the electric and magnetic fields have the same amplitude and frequency, and they are inseparable components of the wave.