Conceptual Physics

We use the classroom shown on the right to discuss reference frames. The classroom shows a professor on a skateboard and Katheri ...

of the observations they make. Both sets of observations are equally valid, given the reference frames of the observers, but the ...

The most prevalent theory of ether stated that it was stationary and the Earth moved through it. An object stationary on the Ear ...

of time intervals differs when observers are in motion relative to one another. To state Einstein’s thought experiment, we use a ...

35.5 - Interactive problem: Conduct Einstein's simultaneity experiment There are two simulations to the right. In the first, the ...

Katherine watches all this and measures the time between the throw and the catch using her stopwatch. This is shown in Concept 2 ...

35.7 - Exploring and deriving time dilation We will use the experiment portrayed on the right to derive the equation for time di ...

Strategy Use the Pythagorean theorem to determine the distance the light pulse moves in one tick as measured by Katherine. Use ...

35.8 - Interactive problem: Experiment with the light clock In this simulation, you experiment with a light clock. The professor ...

appear to our eyes? The observations and measurements made by different observers do differ. In discussions of relativity, much ...

moving away from you. This effect occurs because the motion of the siren changes the frequency of the sound waves that reach you ...

What frequency of light is observed on Earth? f = 5.0×10^14 Hz How fast is the galaxy receding? Wavelength Ȝ 0 of H K lines is 3 ...

35.11 - Relativistic linear momentum In discussing relativistic linear momentum, and the equations that describe it, we start wi ...

What is the momentum of the proton? Its mass is 1.67×10í^27 kg. p = 2.89×10í^19 kg·m/s (Relativistic effects add 15%) 35.12 - Ma ...

Total energy E = Ȗmc^2 E = total energy Ȗ = Lorentz factor m = rest mass c = speed of light When a proton and antiproton collide ...

35.13 - Gotchas If you measure the speed of light from a star that is moving toward you, you will get a higher value than if you ...

Chapter Assumptions Assume the speed of light in a vacuum is 3.00×10^8 m/s for all observers. Chapter 35 Problems Conceptual Pro ...

Earth. Astronaut Naomi sends a laser pulse from the tail of the rocket to the nose, where it reflects off a mirror, and returns ...

Section 9 - Length contraction 9.1 A newly-constructed spaceliner boasts a 105 m long and 65.0 m wide soccer field for the enjoy ...

12.3 In an antimatter warp drive engine, an electron traveling at a speed of 0.410c meets an antielectron (i.e., a positron) hea ...