Which of the following statements are fundamental postulates of the special theory of relativity? More than one statement may be correct. (a) Light moves through a substance called the ether. (b) The speed of light depends on the inertial reference frame in which it is measured. (c) The laws of physics depend on the inertial reference frame in which they are used. (d) The laws of physics are the same in all inertial reference frames. (e) The speed of light is independent of the inertial reference frame in which it is measured.
Doppler Effect (20.7) - Frequency is higher when coming towards the listener - Frequency is lower when moving away from listener - Waves “bunch” in the front while the source moves General Equation for f relative to listener: f = f · VsoundVlistener L sound VsoundVsorce Rules: 1) Velocity is measured with respect to the medium 2) Velocities are positive when moving from listener to source Superposition (21.1) 2 waves passing through each other can momentarily be summed Net Displacement: D +D 1 D 2 net - Node is a point that never moves on D (distance between nodes is half a wavelength, dN = λ 2 - Antinode is the point of maximum displacement (halfway between 2 nodes) Standing Waves (21.2) Travelling to the Right: D