Young’s double slit experiments have been descripted by wave theories, i.e., before and after passing through a double slit, the light is waves. To test the wave description, we extend the double slit experiments to the comprehensive double slit experiments by utilizing Shield, Metal tube, Blocker, Combination of Shield and Blocker with two triangle cuts, Photon-Chamber, and Lens. We propose both “Postulate on light: light is photons before and after passing through double slit” and “Postulate on lens: light behaves same before and after passing through lens”. Then, we show the novel phenomena of the comprehensive double slit experiments: (1) the light is photons, not waves, before and after passing through a double slit; (2) it is the photons that form both the non-interference patterns and interference patterns; (3) the non-interference patterns gradually evolve to the interference patterns in the same experiment. We refer to the novel phenomena as “PhotoWave phenomena” that are universal. The comprehensive double slit experiments provide the novel phenomena for developing theoretical model further to study: (1) the nature of the light; (2) the Feynman’s mystery of the double slit; (3) the wave-particle duality; (4) the wave theories of the light; (5) the quantum theory of matter. A complete explanation is demanded and should describe all the comprehensive double slit experiments consistently.

double slit experiment, interference pattern, non-interference pattern, Shield, Blocker, Photon-Chamber, lens, PhotoWave phenomena