QR3.1 What is Light?

Light is all around us yet it has always been a mystery. As Einstein commented just before he died:

All these fifty years of conscious brooding have brought me no nearer to the answer to the question ‘What are light quanta?’Nowadays every Tom, Dick and Harry thinks he knows it, but he is mistaken.” (Walker, 2000) p89

Nothing has changed today, as physics remains quite unable to say what light actually is.

QR3.1.1 The Mystery of Light

QR3.1.2 Particle or Wave?

QR3.1.3 Young’s Experiment

QR3.1.4 The Copenhagen Compromise

QR3.1.5 How Come The Quantum?