Conceptual Physics

different conclusions can be drawn about which power source really is the cheapest. However, the numbers above reflect the costs ...

This feedback mechanism can be likened to the audio feedback that may occur with a sound amplifier. If you have ever winced at t ...

If you shine ultraviolet light upon certain minerals, such as calcite, they fluoresce, that is, they glow as long as the energiz ...

normal population. Some of the atoms are at higher energy levels, but most are not. This is typical of a material that is in the ...

emitting photons in all directions in the process. Those photons are in essence “noise” while the stimulated emission photons ar ...

Step-by-step solution Step Reason 1. E = hf energy of photon 2. frequency, wave speed and wavelength 3. substitute equation 2 in ...

Chapter Assumptions When converting between electron-volts and joules, assume that 1 eV = 1.60×10–19 J Chapter 36 Problems Conce ...

C.9 Does energy need to be continually supplied to maintain a population inversion? Explain your answer. Yes No Section Problems ...

Section 11 - Conduction in solids 11.1 What is the longest wavelength that a photon can have to promote an electron from the top ...

37.0 - Introduction Richard Feynman (1918 í 1988) was an American physicist best known to the general public for his leading rol ...

37.1 - The Compton effect Compton effect: Considering x-rays as composed of particles explains why their frequency diminishes as ...

Not only did Compton’s work explain the reduction in frequency, but his analysis of the collision also correctly relates the dir ...

of a photon, p = h/Ȝ, could also be applied to matter. A particle’s wavelength, sometimes called the de Broglie wavelength, is r ...

37.4 - Matter waves are probabilistic De Broglie correctly asserted that electrons and other particles can be described as matte ...

which in this case is in its lowest energy state. We then construct a probability density graph. It shows that the particle is m ...

37.6 - Heisenberg uncertainty principle In prior sections, we discussed the interpretation of a matter wavefunction as relating ...

37.7 - Gotchas More massive particles always have shorter de Broglie wavelengths than less massive particles. Not necessarily. A ...

Chapter Assumptions 1 eV = 1.60×10–19 J h = 6.63×10–34 J·s ƫ = 1.05×10–34 J·s mec^2 = 0.511 MeV Chapter 37 Problems Conceptual P ...

Section 3 - Observing matter waves 3.1 A beam of neutrons, all moving at the same speed, is directed through a pair of slits who ...

38.0 - Introduction “Turn off the lights when you leave the room.” “Don’t buy that gas guzzler.” “Turn the thermostat down a few ...