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What is light? Let's talk about all the details of this important phenomenon that allows us to do astronomy. Does time pass for a photon? Is it a wave or a particle? What is optics? A conversation about non-linear physics to understand something as complex as light that travels at a constant speed in the universe, that does not feel the passage of time and that behaves in very strange ways. The guest on this occasion is Marcel Clerc, a physicist from the University of Chile. AUDIO EPISODE http://astroblog.cl/episodio106 MY SOCIAL NETWORKS http://bit.ly/1tDW5MF_INSTAGRAM http://bit.ly/1sNHWvJ_FACEBOOK http://bit.ly/2hjdKpD_TWITTER [ASTRONOMY AND MORE PODCAST] http://bit.ly/1XyOISH_PODCAST [MUSIC] PATRICK MOORE http://bit.ly/1rkRqxk