Question

Is there a superposition principle of intensity of light?

Answer 1

The intensity  of the light is zero. This non-uniform distribution of energy is called interference of light. Thus, interference of light is the phenomenon of non-uniform distribution of light energy in a medium due to a superposition of light waves from two coherent sources.

Answer 2

The principle of superposition states that, when two or more waves of the same type cross at some point, the resultant displacement at that point is equal to the sum of the displacements due to each individual wave.