A progressive wave is represented by y = 12 sin (5t – 4x) cm. On this wave, how far away are the two points having phase difference of 90o? A progressive wave is represented by y = 12 sin (5t - 4x) cm. On this wave how far away are the two points having phase difference of 90o? November 11, 2020 Category: Chapter 17 - Wave Motion , MTG NEET Physics , Part 1 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related