Question

Huygens theory and the modern photon wave function

Answer 1

Explanation:

According to huygens principal. Each point of the wavefront is a force of a secondary disturbance and the wavelets emanating from these points spread out in all direction with the speed of the wave.These wavelets emanating from the wavefront are usually referred to as secondary wavelets if we draw common tangent to all these spheres, we obtain the new position of the wavefront at letter time.