I think light could not be recoginzed as a vector. However, I think the light intensity could be devided into the x-y axises.
Refractive index is a scalar quantity because it describes how light propagates through a medium by bending, or refracting, without considering a specific direction of travel.
Speed is a scalar quantity that refers to how fast an object is moving, whereas velocity is a vector quantity that refers to both the speed and direction of an object's motion. Speed is the magnitude of velocity.
Amplitude is the measure of the magnitude of a wave, representing its maximum displacement from the equilibrium position. It is a scalar quantity and is always a positive value. Amplitude determines the intensity or loudness of a wave in sound waves and the brightness or intensity of a wave in light waves.
A quantity with only one measure is known as a scalar. Scalars have magnitude but no direction, such as distance, speed, and mass.
Potential energy, mass, the speed of light and temperature are scalars, not vectors - to name a few.Vectors have magnitude and direction. Some examples are force, acceleration, momentum, velocity, torque. Distance could have a direction added to it; it depends on the context (ex: drive North for 12 miles, then turn and drive East for 5 miles).