The fact is that light is a wave that has all its properties. Such as interference and diffraction. Francesco Grimaldi, conducting a series of experiments, discovered that light deviates from rectilinear propagation and called this phenomenon diffraction. Robert Hooke tried to explain different colors using the analogy between light and sound. Christian Huygens introduced the principle of wave physics to explain the phenomenon of reflection and refraction. Thomas Jung introduced the concept of interference. Augustin Jean Fresnel explained the phenomenon of light diffraction.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.