I have the fifth edition of 'Physics' by Halliday, Resnick and Krane. In the chapter 'The Nature of Light' it is stated that it is possible to explain both photoelectric effect and Compton effect in classical electromagnetic wave theory and this has been known since 1927. It says that photoelectric effect was explicitly shown to be explainable by wave theory in 1969 by W.E. Lamb and M.O. Scully. http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19680009569_1968009569.pdf It says that the experiment that really cannot be explained by the wave theory was conducted by J.F. Clauser in 1974 and then again corrected and performed by P. Grangier, G. Roger and A.Aspect in 1986. However when I searched the internet, I didn't get anything for Compton effect and read this https://www.physicsforums.com/showthread.php?t=372653 on physics forums. Although both the paper and most of the discussion is beyond my level, I can sense most people don't agree with it. So what is the generally accepted view in this regard? Thanks in advance.