A progressive sound wave of frequency 500Hz is travelling through air with a speed of 360ms−1. How far apart are two points 60 degree out of phase? A progressive sound wave of frequency 500Hz is travelling through air with a speed of 360ms−1. How far apart are two points 60 degree out of phase? November 11, 2020 Category: Chapter 17 - Wave Motion , MTG NEET Physics , Part 1 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related