One of the most passed on misconceptions in Physics teaching concerns the red shift of electromagnetic waves. Students in science classes are taught about the Doppler effect of sound waves. If a rapidly moving car moves away from us the sound waves that we hear appear to be stretched out and we hear a lower pitch. Students are then taught that when a very rapidly moving luminous object moves away from us the light waves are stretched out and in this case the effect is known as a red shift. However, is the reverse true? If we observe a red shift does it mean that the object making the light waves must be moving away from us?
Physics and Mathematics
What are the concepts in Physics and Mathematics that students find difficult? In this blog I will post tutorial points that I hope will stimulate thinking and so broaden the knowledge and understanding of students allowing them to write thorough examination responses. Tutorial notes, from a student's point of view, will be posted on the HSC, IB and university level topics of Relativity, Electromagnetism, Mechanics, Quantum Physics and Calculus. The overall purpose of these pages is to encourage and promote learning in Physics and Mathematics and so open new horizons in learning.